A269281 Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

0, 2598156, 938176344, 279339197256, 75556007986536, 19356924219624936, 4786284820998999528, 1154228064358389881112, 273210106596010141952520, 63745055133289730721040968, 14703244384392257014503473256

Offset

1,2

Comments

Row 6 of A269276.

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..0. .2..1. .0..2. .0..2. .0..1. .2..0. .0..0. .2..2. .2..1. .0..1
..1..3. .0..2. .3..0. .1..1. .0..0. .1..1. .3..2. .0..0. .1..1. .0..2
..2..3. .0..0. .0..1. .0..0. .3..3. .3..1. .3..2. .3..1. .0..1. .2..1
..1..0. .2..0. .0..2. .1..0. .3..1. .1..2. .3..3. .3..1. .1..0. .0..2
..1..2. .0..0. .0..2. .1..0. .0..1. .3..1. .3..2. .3..2. .2..3. .0..1

Crossrefs

Cf. A269276.

Sequence in context: A237920 A317615 A250706 * A186588 A204882 A183660

Adjacent sequences: A269278 A269279 A269280 * A269282 A269283 A269284

Keyword

nonn

Author

R. H. Hardin, Feb 21 2016

Status

approved