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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.

A196016 Number of n X 7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.

Table of values

n a(n)
1 1
2 9
3 32
4 231
5 835
6 3572
7 22711
8 100094
9 517009
10 2740712
11 14291156
12 72486659
13 375604408
14 1948549100
15 10070403094
16 52010772351
17 269069912146
18 1391421035119
19 7193724490586
20 37198028475134
21 192356730926735
22 994618459574872
23 5142944193784753
24 26593708572196934

List of values

[1, 9, 32, 231, 835, 3572, 22711, 100094, 517009, 2740712, 14291156, 72486659, 375604408, 1948549100, 10070403094, 52010772351, 269069912146, 1391421035119, 7193724490586, 37198028475134, 192356730926735, 994618459574872, 5142944193784753, 26593708572196934]

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

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