A269200 Number of n X 7 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

8748, 3212820, 1184381844, 399104835612, 128136007344516, 39825831571425924, 12093315071771856492, 3608384928930423012804, 1062048602869077147571956, 309185374985245150329134076, 89206481105125372533736647588

Offset: 1

Author

R. H. Hardin, Feb 20 2016

Keywords

• nonn

Comments

Column 7 of A269201.

Examples

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

Links

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

Crossrefs

Cf. A269201.