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 A222351 #5 Jun 02 2025 08:26:20 %S A222351 987,12087,69142,312019,1284780,5094040,19896840,77321250 %N A222351 Number of (n+7)X1 arrays of occupancy after each element moves up to +-n places including 0. %C A222351 Row 7 of A222345 %e A222351 Some solutions for n=3 %e A222351 ..0....0....2....1....0....1....1....0....0....1....0....0....1....1....0....0 %e A222351 ..0....0....0....0....3....0....1....1....1....1....0....2....3....0....0....1 %e A222351 ..2....0....2....0....0....1....2....1....2....3....0....2....0....3....0....0 %e A222351 ..1....1....2....0....2....1....1....2....3....0....1....0....1....0....4....0 %e A222351 ..0....1....0....2....0....1....1....0....0....2....3....2....2....1....0....4 %e A222351 ..0....1....2....2....1....2....3....0....1....1....1....0....0....2....5....0 %e A222351 ..3....2....2....1....0....4....1....1....0....1....3....0....1....0....1....0 %e A222351 ..0....1....0....2....0....0....0....1....2....1....2....4....1....0....0....0 %e A222351 ..0....1....0....1....2....0....0....1....0....0....0....0....0....2....0....3 %e A222351 ..4....3....0....1....2....0....0....3....1....0....0....0....1....1....0....2 %K A222351 nonn %O A222351 1,1 %A A222351 _R. H. Hardin_ Feb 16 2013