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 A206875 #7 Apr 16 2023 20:23:36 %S A206875 37,1369,17737,397221,8373905,159327093,3254925997,65503023421, %T A206875 1306330464063,26282885757023,527346719280577,10574042671627575, %U A206875 212249791397406163,4258527016456970551,85440779581637659129 %N A206875 Number of 6 X n 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically. %C A206875 Row 6 of A206871. %H A206875 R. H. Hardin, <a href="/A206875/b206875.txt">Table of n, a(n) for n = 1..210</a> %e A206875 Some solutions for n=4 %e A206875 ..1..0..1..1....0..1..0..0....1..1..1..1....0..1..1..0....0..1..1..0 %e A206875 ..0..1..1..0....0..1..0..1....0..1..1..1....1..0..1..0....0..0..1..1 %e A206875 ..0..1..0..0....1..0..0..1....0..0..1..1....1..0..0..1....0..0..1..0 %e A206875 ..1..0..0..1....1..0..0..1....1..0..1..0....1..0..0..1....0..0..1..0 %e A206875 ..1..0..1..0....0..0..1..1....1..1..0..0....1..1..0..0....0..1..0..1 %e A206875 ..1..1..1..0....0..1..1..0....0..1..0..0....1..1..1..0....0..1..0..1 %Y A206875 Cf. A206871. %K A206875 nonn %O A206875 1,1 %A A206875 _R. H. Hardin_, Feb 13 2012