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 A264344 #4 Nov 11 2015 19:46:25 %S A264344 32,987,49000,1399783,53429620,1855980772,67833964762,2424688746359, %T A264344 87826990190824,3164364890450187,114329873155945874, %U A264344 4126859698045051896,149032951757557392004,5381261860217202123333,194318967652718474091224 %N A264344 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 0,1 or 1,2. %C A264344 Row 4 of A264341. %H A264344 R. H. Hardin, <a href="/A264344/b264344.txt">Table of n, a(n) for n = 1..210</a> %e A264344 Some solutions for n=3 %e A264344 ..1..0..2..3....1..0..3..2....0..7..2..3....1..0..2..3....1..7..2..3 %e A264344 ..4..5..6..7....4..6..5..7....5..4..6..1...10..5..7..6....4..5..0..6 %e A264344 ..8..9.10.11...14..9.11.10....8..9.10.11....8..9..4.11....8.10..9.11 %e A264344 .12.13.14.15...12.19..8.15...12.13.15.14...13.19.14.15...12.13.14.15 %e A264344 .16.17.18.19...17.16.18.13...17.16.18.19...16.17.12.18...16.17.19.18 %Y A264344 Cf. A264341. %K A264344 nonn %O A264344 1,1 %A A264344 _R. H. Hardin_, Nov 11 2015