A triangular number is the sum of the n natural numbers from 1 to n. ...
http://en.wikipedia.org/wiki/Triangular_number
|
Centered triangular number - Wikipedia, the free encyclopedia
|
|
A centered triangular number is a centered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers. The centered...
en.wikipedia.org/wiki/Centered_triangular_number
|
|
|
Informations about Triangular Numbers ... Eric W. Weisstein (world of mathematics) ; Triangular Number (Figurate Number, Heptagonal Triangular Number, Octagonal Triangular Number, Pentagonal Triangular Number, Pronic Number, Square Triangular Number)
|
www.mathematische-basteleien.de/triangularnumber.htm
www.mathematische-basteleien.de/triangularnumber.htm
|
|
|
|
What is a triangular number? ... Date: 4/11/96 at 10:37:41 From: Anonymous Subject: Triangular Numbers What is a Triangular Number? I have tried to look it up in my brother's math book, but it's not there! I even tried my own math book too!
|
mathforum.org/dr.math/problems/traycln4.11.96.html
|
|
|
|
A triangular number is a figurate number: a number that can be represented by a regular geometric arrangement of equally spaced points. ... Ask Dr. Math Archives: What is a triangular number? Why is 1 a triangular number?
|
mathforum.org/workshops/usi/pascal/pascal_triangular.ht...
mathforum.org/workshops/usi/pascal/pascal_triangular.html
|
|
|
A triangular number is the number of dots in an equilateral triangle evenly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangle number. The nth triangle number is the number of dots in a triangl...
http://answers.wikia.com/wiki/What_is_a_triangular_numb...
|
|
Curious properties of triangular numbers including reversible, happy, harshad, highly composite, deficient, abundant triangular numbers ... Can anybody find the third triangular number whose square is also a triangular number ?.
|
www.shyamsundergupta.com/triangle.htm
www.shyamsundergupta.com/triangle.htm
|
|
That is, the $n$ th triangular number is simply the sum of the first $n$ natural numbers. The first few triangular numbers are ... The name triangular number comes from the fact that the summation defining $t_n$ can be visualized as the number of dots in...
|
planetmath.org/encyclopedia/TriangularNumbers.html
planetmath.org/encyclopedia/TriangularNumbers.html
|
|
alphabetical | galleries | topics | For Quick Reference: drag this m-button to your links toolbar ... Your request failed to complete. Details follow: ... For input string: "Triangular number/1019...
|
thesaurus.maths.org/dictionary/map/word/Triangular+numb...
thesaurus.maths.org/dictionary/map/word/Triangular+number/1019
|
|
