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 A237389 #6 Jul 23 2025 10:08:52 %S A237389 68064,1379886,28732972,629612266,14010191373,312459028946, %T A237389 6958669132771,154932883163426,3448837532977725,76806151538720222, %U A237389 1712576070422070546,38161120519580829710,850125433535786412045,18935483294737011140248 %N A237389 Number of (n+1)X(5+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock. %C A237389 Column 5 of A237391 %H A237389 R. H. Hardin, <a href="/A237389/b237389.txt">Table of n, a(n) for n = 1..49</a> %e A237389 Some solutions for n=1 %e A237389 ..2..2..0..1..0..0....1..0..2..0..1..2....0..1..2..2..0..1....2..2..1..0..2..2 %e A237389 ..1..0..1..1..2..2....0..2..0..1..1..2....1..1..2..0..0..2....1..0..1..0..2..2 %K A237389 nonn %O A237389 1,1 %A A237389 _R. H. Hardin_, Feb 07 2014