A299306 Number of nX7 0..1 arrays with every element equal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

8, 2048, 13075, 144040, 3860858, 76611604, 1227812226, 23819382545, 471369052777, 8749447076371, 164571560365968, 3152188315142786, 59832211663862100, 1132092731063667371, 21504285978321722965

Offset

1,1

Comments

Column 7 of A299307.

Links

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

Example

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

Crossrefs

Cf. A299307.

Sequence in context: A298769 A299566 A298388 * A299464 A300107 A139298

Adjacent sequences: A299303 A299304 A299305 * A299307 A299308 A299309

Keyword

nonn

Author

R. H. Hardin, Feb 06 2018

Status

approved