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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.

A197198 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.

Table of values

n a(n)
1 13
2 178
3 1801
4 21803
5 247053
6 2873141
7 33176391
8 383262156
9 4432780869
10 51234398070
11 592247668688
12 6846309893866
13 79142347014020
14 914861421385891
15 10575600998801299
16 122251698517890245
17 1413202926345456663

List of values

[13, 178, 1801, 21803, 247053, 2873141, 33176391, 383262156, 4432780869, 51234398070, 592247668688, 6846309893866, 79142347014020, 914861421385891, 10575600998801299, 122251698517890245, 1413202926345456663]

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

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