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 A295917 #9 Aug 02 2025 12:16:35 %S A295917 34,277,2919,30721,314044,3261576,33703065,348555744,3605337986, %T A295917 37285194645,385624285944,3988244570918,41247771387074, %U A295917 426598922843727,4412031119622050,45630745244822573,471928833647029372,4880850060681141219,50479427900333015968,522075580210608201142 %N A295917 Number of n X 7 0..1 arrays with each 1 adjacent to 0 or 3 king-move neighboring 1s. %H A295917 R. H. Hardin, <a href="/A295917/b295917.txt">Table of n, a(n) for n = 1..210</a> %e A295917 Some solutions for n=4: %e A295917 ..1..0..0..1..1..0..1. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0 %e A295917 ..0..0..0..1..1..0..0. .0..0..0..0..0..0..0. .0..0..1..0..1..0..0 %e A295917 ..0..0..0..0..0..0..0. .0..1..1..0..0..0..1. .0..0..0..0..0..0..1 %e A295917 ..0..0..1..0..0..0..0. .0..1..1..0..0..0..0. .0..1..0..0..0..0..0 %Y A295917 Column 7 of A295918. %K A295917 nonn %O A295917 1,1 %A A295917 _R. H. Hardin_, Nov 29 2017