A269205 Number of 5 X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

1024, 132300, 8314020, 555862380, 34838403756, 2135938293684, 128136007344516, 7568312936979972, 441444334269067260, 25489789190515708236, 1459585457554075237908, 82994548126187965994148

Offset: 1

Author

R. H. Hardin, Feb 20 2016

Keywords

• nonn

Comments

Row 5 of A269201.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 52

Crossrefs

Cf. A269201.

Formula

Empirical recurrence of order 52 (see link above).