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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.

A254450 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically.

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%I A254450 #6 Jul 23 2025 14:41:11
%S A254450 512,26380,2085712,275772848,71814202464,37859718002056,
%T A254450 41728495959588032,96370792918403418032,471658574277826549969856,
%U A254450 4899488261874299641047185592,107824890536438862557050692197760
%N A254450 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically.
%C A254450 Diagonal of A254457
%e A254450 Some solutions for n=2
%e A254450 ..0..1..0..0....0..0..0..0....1..0..1..0....1..1..1..1....0..0..1..1
%e A254450 ..1..1..1..0....0..1..1..1....0..1..0..1....0..0..1..1....0..1..1..1
%e A254450 ..0..0..0..0....1..1..0..1....0..0..0..0....1..1..1..0....1..1..1..1
%e A254450 ..0..1..1..1....1..0..1..1....0..1..0..0....1..0..1..1....0..0..0..0
%K A254450 nonn
%O A254450 1,1
%A A254450 _R. H. Hardin_, Jan 30 2015

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