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 A211697 #6 Jun 02 2025 07:47:59 %S A211697 1,2,3,4,5,6,9,14,21,30,41,59,89,136,205,301,444,669,1026,1580,2411, %T A211697 3666,5611,8683,13542,21123,32891,51299,80449,126956,201015,318548, %U A211697 505308,803817,1284015,2058497,3307355,5321782,8579735,13871094,22493894 %N A211697 Number of nonnegative integer arrays of length n+2*5-2 with new values introduced in order 0 upwards and every value appearing only in runs of at least 5. %C A211697 Column 5 of A211700 %H A211697 R. H. Hardin, <a href="/A211697/b211697.txt">Table of n, a(n) for n = 1..210</a> %e A211697 All solutions for n=5 %e A211697 ..0....0....0....0....0 %e A211697 ..0....0....0....0....0 %e A211697 ..0....0....0....0....0 %e A211697 ..0....0....0....0....0 %e A211697 ..0....0....0....0....0 %e A211697 ..0....0....0....1....0 %e A211697 ..1....0....0....1....0 %e A211697 ..1....1....0....1....0 %e A211697 ..1....1....1....1....0 %e A211697 ..1....1....1....1....0 %e A211697 ..1....1....1....1....0 %e A211697 ..1....1....1....1....0 %e A211697 ..1....1....1....1....0 %K A211697 nonn %O A211697 1,2 %A A211697 _R. H. Hardin_ Apr 19 2012