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 A251064 #6 May 11 2023 11:01:50 %S A251064 112373,6678657,432850109,30334449677,2179252808041,158459225199843, %T A251064 11583623256480548,849126733873227941,62330147178086289818, %U A251064 4578812877202662645937,336496570208098704484079 %N A251064 Number of (n+1) X (7+1) 0..2 arrays with no 2 X 2 subblock having x11-x00 less than x10-x01. %C A251064 Column 7 of A251065. %H A251064 R. H. Hardin, <a href="/A251064/b251064.txt">Table of n, a(n) for n = 1..210</a> %e A251064 Some solutions for n=1 %e A251064 ..0..0..0..1..2..2..1..2....1..1..0..0..0..0..1..1....1..2..0..2..2..2..1..1 %e A251064 ..1..1..1..0..0..0..2..2....0..0..1..2..2..2..2..2....0..0..2..1..1..1..2..2 %Y A251064 Cf. A251065. %K A251064 nonn %O A251064 1,1 %A A251064 _R. H. Hardin_, Nov 29 2014