A269218 Number of 5Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

0, 103488, 6712704, 474091776, 30541426560, 1910809190712, 116322554833728, 6948456736101264, 408916976890552416, 23782890276972969552, 1370013927382609217472, 78294173211595616892096

Offset

1,2

Comments

Row 5 of A269214.

Links

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

R. H. Hardin, Empirical recurrence of order 52

Formula

Empirical recurrence of order 52 (see link above)

Example

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

Crossrefs

Cf. A269214.

Sequence in context: A237572 A255210 A147526 * A237894 A171162 A235721

Adjacent sequences: A269215 A269216 A269217 * A269219 A269220 A269221

Keyword

nonn

Author

R. H. Hardin, Feb 20 2016

Status

approved