cp's OEIS Frontend

A188521 Number of nX7 binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally.

%I A188521 #7 Jul 22 2025 11:15:22
%S A188521 54,2916,63575,1286120,22015314,359696109,5593606875,85072486586,
%T A188521 1270511986433,18779814902475,275479123825628,4021463733992753,
%U A188521 58503148106709186,849117447746208056,12303966393066654445
%N A188521 Number of nX7 binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally.
%C A188521 Column 7 of A188523
%H A188521 R. H. Hardin, <a href="/A188521/b188521.txt">Table of n, a(n) for n = 1..200</a>
%e A188521 Some solutions for 3X7
%e A188521 ..0..0..0..0..1..1..1....1..0..0..0..0..1..1....1..0..0..0..0..1..0
%e A188521 ..0..0..1..0..0..1..0....1..0..1..0..1..1..1....0..0..0..0..0..0..1
%e A188521 ..1..1..1..1..1..1..1....1..0..1..1..1..1..1....0..0..0..1..0..1..1
%K A188521 nonn
%O A188521 1,1
%A A188521 _R. H. Hardin_ Apr 02 2011