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 A189615 #7 Jul 22 2025 11:50:52 %S A189615 65,4225,116100,2482591,68121839,2076231513,61652076124,1785011303305, %T A189615 52081392909734,1531637258052071,45087524679984918, %U A189615 1325492265359151122,38967877720497094747,1146070566293713302197,33712980614275859943483 %N A189615 Number of nX7 binary arrays without the pattern 0 1 0 diagonally, antidiagonally or horizontally. %C A189615 Column 7 of A189617 %H A189615 R. H. Hardin, <a href="/A189615/b189615.txt">Table of n, a(n) for n = 1..200</a> %e A189615 Some solutions for 3X7 %e A189615 ..0..0..1..1..1..0..1....0..0..1..1..0..1..1....1..1..1..1..0..0..1 %e A189615 ..1..0..1..1..0..0..0....0..0..0..0..0..0..1....1..0..1..1..0..0..0 %e A189615 ..1..1..0..1..1..1..0....1..0..1..1..1..1..0....1..0..1..1..1..1..1 %K A189615 nonn %O A189615 1,1 %A A189615 _R. H. Hardin_ Apr 24 2011