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A185902
1/8 the number of nX5 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors
0
15, 38731, 28967421, 32611077940, 30884279980274
OFFSET
1,1
COMMENTS
Column 5 of A185903
EXAMPLE
Some solutions for 3X5 with a(1,1)=0
..0..4..0..0..4....0..0..6..6..6....0..0..0..2..6....0..0..6..6..0
..0..4..6..0..4....4..4..4..0..0....0..4..4..2..6....4..4..4..0..0
..0..4..6..0..4....0..0..4..5..5....0..0..4..2..6....4..0..0..7..7
CROSSREFS
Sequence in context: A157643 A340291 A104682 * A358676 A013756 A078185
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2011
STATUS
approved