cp's OEIS Frontend

A222508 Number of nX7 0..1 arrays with exactly floor(nX7/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

%I A222508 #6 Jul 23 2025 02:41:35
%S A222508 5,44,441,8489,81537,1802656,19892241,473772613,5455705052,
%T A222508 132847734428,1556509083100,38249750511090,451888833065131,
%U A222508 11163258877769638,132555800154675325,3286688523503328223,39169490256183059057
%N A222508 Number of nX7 0..1 arrays with exactly floor(nX7/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
%C A222508 Column 7 of A222509
%H A222508 R. H. Hardin, <a href="/A222508/b222508.txt">Table of n, a(n) for n = 1..30</a>
%e A222508 Some solutions for n=3
%e A222508 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..1..1..1..1..1
%e A222508 ..0..1..0..0..0..0..0....0..0..0..0..1..0..1....1..0..1..1..1..1..1
%e A222508 ..0..0..0..1..0..0..0....0..0..0..0..0..1..0....0..1..0..1..1..1..1
%K A222508 nonn
%O A222508 1,1
%A A222508 _R. H. Hardin_ Feb 23 2013