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 A206935 #7 Jul 22 2025 19:49:02 %S A206935 81,6561,165783,3227589,48992069,659747611,8138711727,95444167901, %T A206935 1083046694943,12066441712663,133097165591799,1461908430267595, %U A206935 16040101557258779,176117037501045883,1936527748635116761 %N A206935 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically. %C A206935 Column 7 of A206936 %H A206935 R. H. Hardin, <a href="/A206935/b206935.txt">Table of n, a(n) for n = 1..210</a> %e A206935 Some solutions for n=4 %e A206935 ..1..1..1..0..1..1..0....1..0..0..1..1..0..1....1..1..1..0..0..1..0 %e A206935 ..0..1..1..0..0..1..0....0..0..1..0..1..0..0....0..1..0..1..1..0..1 %e A206935 ..1..0..0..1..1..1..0....1..1..0..0..1..1..0....0..0..1..0..0..1..0 %e A206935 ..0..0..1..0..0..1..0....0..0..1..1..0..0..1....1..1..0..0..1..0..0 %K A206935 nonn %O A206935 1,1 %A A206935 _R. H. Hardin_ Feb 13 2012