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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.

A194781 Number of lower triangles of a (2n+1)X(2n+1) 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 6
2 41
3 265
4 1736
5 11857
6 85007
7 639753
8 5045602
9 41615156
10 358185389
11 3210667479
12 29914284821
13 289187621887

List of values

[6, 41, 265, 1736, 11857, 85007, 639753, 5045602, 41615156, 358185389, 3210667479, 29914284821, 289187621887]

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

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