A269073 Number of nX6 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

41, 489, 7477, 102545, 1383105, 18220241, 236272677, 3024972401, 38333973609, 481701017577, 6010309951205, 74542025956769, 919716929870465, 11296618314880209, 138204770920790229, 1684906034464128193

Offset: 1

Author

R. H. Hardin, Feb 19 2016

Keywords

• nonn

Comments

Column 6 of A269075.

Examples

			Some solutions for n=4
..1..0..0..0..0..0. .0..0..1..0..0..1. .1..0..0..0..0..1. .0..0..1..0..1..0
..0..0..0..0..1..0. .1..0..0..1..0..0. .0..0..0..0..0..0. .1..0..1..0..0..0
..0..0..1..0..1..0. .1..0..0..0..0..0. .0..0..1..0..0..1. .0..0..0..0..1..0
..1..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..1. .1..0..0..0..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A269075.

Formula

Empirical: a(n) = 28*a(n-1) -230*a(n-2) +192*a(n-3) +3805*a(n-4) -5776*a(n-5) -27808*a(n-6) +25744*a(n-7) +101333*a(n-8) -13916*a(n-9) -149690*a(n-10) -66848*a(n-11) +23183*a(n-12) +9888*a(n-13) -2304*a(n-14)