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 A222346 #5 Oct 13 2021 00:42:58 %S A222346 8,33,124,460,1714,6433,24308,92376,352714,1352076 %N A222346 Number of (n+2) X 1 arrays of occupancy after each element moves up to +-n places including 0. %C A222346 Row 2 of A222345. %e A222346 Some solutions for n=3 %e A222346 ..1....0....2....0....1....1....0....1....0....4....2....0....3....0....1....0 %e A222346 ..0....1....0....1....2....2....2....1....0....0....0....2....0....5....2....1 %e A222346 ..0....0....3....3....1....0....0....1....2....0....1....2....0....0....1....1 %e A222346 ..1....1....0....1....1....1....3....2....2....1....2....1....1....0....0....0 %e A222346 ..3....3....0....0....0....1....0....0....1....0....0....0....1....0....1....3 %Y A222346 Cf. A222345. %K A222346 nonn %O A222346 1,1 %A A222346 _R. H. Hardin_ Feb 16 2013