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 A229845 #6 Jun 02 2025 08:39:10 %S A229845 33,11925,2381469,514371027,110203382331,23643209345079, %T A229845 5071373978989773,1087831682400037245,233343097940265968895, %U A229845 50052836990651965982781,10736490824597247024029007,2303011092556221535827632853 %N A229845 Number of nX6 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j). %C A229845 Column 6 of A229847 %H A229845 R. H. Hardin, <a href="/A229845/b229845.txt">Table of n, a(n) for n = 1..210</a> %e A229845 Some solutions for n=3 %e A229845 ..1..0..1..1..1..1....2..0..1..1..0..2....0..0..0..2..1..1....1..0..2..2..0..0 %e A229845 ..1..2..0..1..1..2....0..1..0..1..1..1....2..2..0..0..1..1....1..0..0..0..0..2 %e A229845 ..2..0..0..2..1..0....2..1..2..1..0..2....0..0..2..2..0..1....1..2..0..0..2..0 %K A229845 nonn %O A229845 1,1 %A A229845 _R. H. Hardin_, Oct 01 2013