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 A207093 #7 Jul 22 2025 20:01:28 %S A207093 54,2916,88465,3500117,134515416,4992838052,189659424011, %T A207093 7170730063393,270475089293918,10224494565608260,386259141164549753, %U A207093 14590174277869464225,551225314435579230372,20824003807957963946688 %N A207093 Number of 7Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically. %C A207093 Row 7 of A207088 %H A207093 R. H. Hardin, <a href="/A207093/b207093.txt">Table of n, a(n) for n = 1..210</a> %e A207093 Some solutions for n=4 %e A207093 ..0..1..1..0....1..0..0..1....0..1..1..1....0..0..1..0....0..0..1..1 %e A207093 ..1..1..0..1....0..1..1..0....1..0..0..1....0..1..1..1....0..0..1..1 %e A207093 ..1..0..0..1....1..0..1..1....0..1..0..0....0..0..1..0....0..0..1..1 %e A207093 ..1..1..0..0....1..1..1..1....0..1..0..0....0..1..0..0....0..0..1..0 %e A207093 ..0..1..0..1....1..1..0..1....0..1..0..0....0..1..1..0....0..0..1..0 %e A207093 ..1..0..0..1....0..0..1..0....0..1..0..0....0..0..1..0....0..0..1..0 %e A207093 ..1..1..0..1....0..1..1..1....0..1..0..0....0..1..0..0....0..0..1..0 %K A207093 nonn %O A207093 1,1 %A A207093 _R. H. Hardin_ Feb 15 2012