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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.

A194779 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 1
2 7
3 43
4 268
5 1740
6 11862
7 85013
8 639760
9 5045610
10 41615165
11 358185399
12 3210667490
13 29914284833
14 289187621900
15 2895861006415

List of values

[1, 7, 43, 268, 1740, 11862, 85013, 639760, 5045610, 41615165, 358185399, 3210667490, 29914284833, 289187621900, 2895861006415]

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

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