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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.

A254168 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Table of values

n a(n)
1 512
2 3036
3 3036
4 16240
5 23660
6 16240
7 76832
8 164408
9 164684
10 76832
11 348032
12 1078032
13 1553720
14 1014816
15 348032
16 1511152
17 6831024
18 15016048
19 13514192
20 6159516
21 1511152
22 6440848
23 41678024
24 139009432
25 191190272
26 119471400
27 36538548

List of values

[512, 3036, 3036, 16240, 23660, 16240, 76832, 164408, 164684, 76832, 348032, 1078032, 1553720, 1014816, 348032, 1511152, 6831024, 15016048, 13514192, 6159516, 1511152, 6440848, 41678024, 139009432, 191190272, 119471400, 36538548]

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

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