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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.

A194783 Number of lower triangles of a (2n+3)X(2n+3) 0..n array with new values introduced in row major order 0..n and no element unequal to more than one horizontal or vertical neighbor.

Table of values

n a(n)
1 23
2 219
3 1641
4 11686
5 84727
6 639325
7 5044981
8 41614291
9 358184223
10 3210665949
11 29914282858
12 289187619416

List of values

[23, 219, 1641, 11686, 84727, 639325, 5044981, 41614291, 358184223, 3210665949, 29914282858, 289187619416]

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

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