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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.

A254457 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically.

Table of values

n a(n)
1 512
2 3036
3 3036
4 16240
5 26380
6 16240
7 76832
8 196684
9 196684
10 76832
11 348032
12 1279568
13 2085712
14 1279568
15 348032
16 1511152
17 8004340
18 19716320
19 19716320
20 8004340
21 1511152
22 6440848
23 48345120
24 180449544
25 275772848
26 180449544
27 48345120

List of values

[512, 3036, 3036, 16240, 26380, 16240, 76832, 196684, 196684, 76832, 348032, 1279568, 2085712, 1279568, 348032, 1511152, 8004340, 19716320, 19716320, 8004340, 1511152, 6440848, 48345120, 180449544, 275772848, 180449544, 48345120]

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

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