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 A278192 #4 Nov 14 2016 22:34:58 %S A278192 0,1532,347116,91270219,23124026160,5858713218010,1482450100931615, %T A278192 375049865320978231,94879541460515598902,24002203229663363493985, %U A278192 6071950545418789283104046,1536048854453696521513657702 %N A278192 Number of 5Xn 0..3 arrays with every element plus 1 mod 4 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero. %C A278192 Row 5 of A278188. %H A278192 R. H. Hardin, <a href="/A278192/b278192.txt">Table of n, a(n) for n = 1..126</a> %e A278192 Some solutions for n=2 %e A278192 ..0..1. .0..3. .0..3. .0..1. .0..3. .0..2. .0..3. .0..2. .0..1. .0..1 %e A278192 ..3..2. .1..0. .1..2. .0..2. .1..2. .1..3. .1..3. .1..3. .3..2. .3..2 %e A278192 ..1..0. .2..3. .1..0. .0..3. .3..1. .0..3. .2..2. .1..2. .2..1. .2..0 %e A278192 ..3..0. .1..1. .1..3. .1..2. .0..0. .3..1. .3..1. .1..3. .0..2. .3..1 %e A278192 ..2..3. .3..0. .2..0. .0..0. .2..3. .1..2. .0..2. .2..0. .3..3. .0..3 %Y A278192 Cf. A278188. %K A278192 nonn %O A278192 1,2 %A A278192 _R. H. Hardin_, Nov 14 2016