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 A222554 #5 Jun 02 2025 08:27:31 %S A222554 6427,24230,92011,350967,1342944,5151294,19797737,76201719,293634727, %T A222554 1132449121,4370239031,16873077353 %N A222554 Number of (n+7)X1 arrays of occupancy after each element moves up to +-7 places but not 0. %C A222554 Column 7 of A222555 %e A222554 Some solutions for n=2 %e A222554 ..1....1....0....2....0....2....2....0....1....2....0....3....1....1....0....0 %e A222554 ..0....0....1....4....2....1....4....2....1....0....0....0....1....1....0....1 %e A222554 ..2....5....0....0....0....1....2....1....4....3....1....1....0....0....0....0 %e A222554 ..0....0....3....3....0....1....0....1....0....0....0....0....0....2....2....4 %e A222554 ..1....0....1....0....0....1....1....1....0....0....0....3....2....1....1....0 %e A222554 ..0....1....1....0....1....1....0....0....1....0....0....1....1....0....2....0 %e A222554 ..1....2....0....0....4....0....0....1....1....4....6....0....0....3....0....2 %e A222554 ..3....0....0....0....0....0....0....0....0....0....2....1....2....1....4....1 %e A222554 ..1....0....3....0....2....2....0....3....1....0....0....0....2....0....0....1 %K A222554 nonn %O A222554 1,1 %A A222554 _R. H. Hardin_ Feb 24 2013