A269294 Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.

4096, 3306744, 1085203980, 309846524148, 81907569617580, 20680187784811380, 5062027330721456172, 1211690913720475660164, 285185178252679536489420, 66240633180683878759737972, 15223317892237120439440690380

Offset

1,1

Comments

Row 6 of A269289.

Links

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

R. H. Hardin, Empirical recurrence of order 40

Formula

Empirical recurrence of order 40 (see link above)

Example

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

Crossrefs

Cf. A269289.

Sequence in context: A224208 A017034 A017118 * A221093 A017214 A017322

Adjacent sequences: A269291 A269292 A269293 * A269295 A269296 A269297

Keyword

nonn

Author

R. H. Hardin, Feb 21 2016

Status

approved