A300601 Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 10, 18, 42, 141, 394, 1397, 4808, 16894, 58420, 204550, 717275, 2514452, 8832464, 31025029, 109010028, 382964169, 1345726769, 4728783025, 16617070485, 58394286019, 205206038686, 721123780407, 2534142867144, 8905406434476

Offset

1,2

Comments

Column 4 of A300605.

Links

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

Example

Some solutions for n=5
..0..1..0..1. .0..1..1..0. .0..1..0..0. .0..1..0..1. .0..1..1..1
..1..1..1..1. .1..0..1..1. .1..1..0..1. .1..1..1..1. .1..0..1..0
..0..0..0..0. .1..1..0..1. .1..0..1..1. .0..0..0..0. .1..1..0..0
..0..1..0..1. .1..0..0..1. .0..0..0..1. .0..1..1..0. .1..0..1..0
..1..1..1..1. .1..1..1..1. .0..0..1..1. .1..1..0..0. .0..0..0..0

Crossrefs

Cf. A300605.

Sequence in context: A064485 A007938 A007937 * A301326 A350317 A255603

Adjacent sequences: A300598 A300599 A300600 * A300602 A300603 A300604

Keyword

nonn

Author

R. H. Hardin, Mar 09 2018

Status

approved