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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.

A194784 Number of lower triangles of a (2n+4)X(2n+4) 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 43
2 493
3 4069
4 30608
5 229869
6 1782111
7 14399939
8 121414559
9 1066897441
10 9753094999
11 92586232382
12 911156698994

List of values

[43, 493, 4069, 30608, 229869, 1782111, 14399939, 121414559, 1066897441, 9753094999, 92586232382, 911156698994]

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

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