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 A222553 #5 Jun 02 2025 08:27:23 %S A222553 1709,6372,24024,91052,346091,1318249,5029086,19207812,73418105, %T A222553 280780468,1074200514,4110562320,15731749698,60212701130,230472089415 %N A222553 Number of (n+6)X1 arrays of occupancy after each element moves up to +-6 places but not 0. %C A222553 Column 6 of A222555 %e A222553 Some solutions for n=3 %e A222553 ..2....1....3....1....1....1....1....0....1....1....0....0....1....0....1....1 %e A222553 ..0....0....1....1....1....2....2....1....3....2....0....1....5....1....1....2 %e A222553 ..0....2....2....2....0....4....0....0....0....0....0....0....1....0....3....0 %e A222553 ..0....2....1....0....1....0....2....1....3....4....0....4....0....2....0....2 %e A222553 ..0....0....1....0....0....0....0....1....0....0....1....3....1....1....0....0 %e A222553 ..3....0....0....0....3....0....2....1....0....0....1....0....0....1....1....3 %e A222553 ..0....3....1....1....2....1....0....0....1....0....0....0....0....3....1....1 %e A222553 ..2....0....0....0....1....1....2....3....0....1....3....1....0....1....1....0 %e A222553 ..2....1....0....4....0....0....0....2....1....1....4....0....1....0....1....0 %K A222553 nonn %O A222553 1,1 %A A222553 _R. H. Hardin_ Feb 24 2013