A304673 Number of n X 5 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 26, 45, 199, 897, 3525, 15544, 68896, 310438, 1387613, 6186243, 27785689, 124415835, 557130770, 2496620845, 11189240404, 50135564778, 224656450818, 1006809534133, 4511766370308, 20218498784795, 90607032838312

Offset

1,2

Comments

Column 5 of A304676.

Links

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

Example

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

Crossrefs

Cf. A304676.

Sequence in context: A178100 A357569 A255988 * A039458 A384411 A291672

Adjacent sequences: A304670 A304671 A304672 * A304674 A304675 A304676

Keyword

nonn

Author

R. H. Hardin, May 16 2018

Status

approved