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.
%I A254164 #6 Jul 23 2025 14:29:03 %S A254164 76832,1078032,15016048,191190272,2437141776,31143715804,399587109728, %T A254164 5135066242396,66055387860800,850097997207468,10942233760318624, %U A254164 140853914363177740,1813183596341937088,23340859396990897980 %N A254164 Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally. %C A254164 Column 4 of A254168 %H A254164 R. H. Hardin, <a href="/A254164/b254164.txt">Table of n, a(n) for n = 1..210</a> %e A254164 Some solutions for n=1 %e A254164 ..1..1..1..0..0..0....0..0..0..0..0..0....0..0..1..0..1..0....1..0..0..0..0..0 %e A254164 ..1..0..0..0..0..0....0..0..0..1..1..0....1..1..0..1..0..0....0..1..1..0..1..0 %e A254164 ..1..0..1..1..1..1....1..1..0..0..0..0....1..0..0..0..0..0....1..0..0..0..1..0 %K A254164 nonn %O A254164 1,1 %A A254164 _R. H. Hardin_, Jan 26 2015