cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A157795 Largest subset of the discrete triangular grid { (a,b,c): a+b+c = n, a,b,c >= 0 } that does not contain any upward-pointing triangles (i.e., triples (a+r,b,c), (a,b+r,c), (a,b,c+r) with r positive).

Table of values

n a(n)
0 1
1 2
2 4
3 6
4 9
5 12
6 15
7 18
8 22
9 26
10 31
11 35
12 40

List of values

[1, 2, 4, 6, 9, 12, 15, 18, 22, 26, 31, 35, 40]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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