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 A251372 #6 Apr 17 2022 21:46:14 %S A251372 36590017,207202101873,1171676222709377,6626420822196876929, %T A251372 37475289004151496747521,211939290252887391404913105, %U A251372 1198610045118318903896947691841,6778667859264959218007000710080097 %N A251372 Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock summing to 1 2 3 4 5 6 or 7. %C A251372 Column 7 of A251373. %H A251372 R. H. Hardin, <a href="/A251372/b251372.txt">Table of n, a(n) for n = 1..210</a> %e A251372 Some solutions for n=1 %e A251372 ..0..0..0..0..0..1..1..0....0..0..0..0..0..2..0..0....0..0..0..0..0..0..1..0 %e A251372 ..2..1..2..1..2..1..1..0....2..1..1..2..0..1..1..2....2..2..1..2..1..2..1..0 %Y A251372 Cf. A251373. %K A251372 nonn %O A251372 1,1 %A A251372 _R. H. Hardin_, Dec 01 2014