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 A222552 #6 Jun 02 2025 08:27:17 %S A222552 456,1668,6220,23341,87752,330274,1244135,4688684,17678240,66670133, %T A222552 251457191,948433758,3577222198,13491914845,50884787739,191905944304, %U A222552 723728206116,2729294349873,10292348908806,38812294765020 %N A222552 Number of (n+5)X1 arrays of occupancy after each element moves up to +-5 places but not 0. %C A222552 Column 5 of A222555 %H A222552 R. H. Hardin, <a href="/A222552/b222552.txt">Table of n, a(n) for n = 1..71</a> %F A222552 Empirical: a(n) = 11*a(n-1) -45*a(n-2) +84*a(n-3) -70*a(n-4) +21*a(n-5) +18*a(n-6) -200*a(n-7) +753*a(n-8) -1183*a(n-9) +631*a(n-10) +8*a(n-11) -2*a(n-12) +58*a(n-13) -32*a(n-14) -6*a(n-15) %e A222552 Some solutions for n=3 %e A222552 ..0....2....1....0....0....1....1....0....0....3....0....0....1....1....0....0 %e A222552 ..0....0....2....1....2....0....6....0....0....0....3....0....0....0....0....4 %e A222552 ..3....0....1....1....2....0....0....0....1....1....0....4....2....2....0....0 %e A222552 ..3....2....1....0....0....4....0....0....0....1....0....0....0....0....2....1 %e A222552 ..0....2....0....5....1....1....0....4....0....0....0....0....0....0....1....3 %e A222552 ..1....0....0....0....1....0....0....0....1....1....2....4....1....3....0....0 %e A222552 ..0....0....3....1....0....1....1....2....3....2....0....0....2....2....2....0 %e A222552 ..1....2....0....0....2....1....0....2....3....0....3....0....2....0....3....0 %K A222552 nonn %O A222552 1,1 %A A222552 _R. H. Hardin_ Feb 24 2013