A269288 Number of nX7 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.

8748, 11026764, 10363900428, 8642330207532, 6751724437907820, 5062027330721456172, 3689070798270477232620, 2633315774277280991138604, 1850184391068250712299997676, 1283831257986363807652886516268

Offset: 1

Author

R. H. Hardin, Feb 21 2016

Keywords

• nonn

Comments

Column 7 of A269289.

Examples

			Some solutions for n=1
..2..1..1..1..1..3..1. .0..3..3..1..1..1..1. .2..0..2..1..1..0..0
		

Links

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

Crossrefs

Cf. A269289.

Formula

Empirical: a(n) = 1384*a(n-1) -566002*a(n-2) [phone]*a(n-3) -3083170217*a(n-4) [phone]*a(n-5) -1288497445564*a(n-6) [phone]*a(n-7) -66380108132464*a(n-8) [phone]*a(n-9) -247475435747904*a(n-10) for n>11