A298138 Number of nX7 0..1 arrays with every element equal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 34, 6, 185, 627, 3417, 14422, 73961, 354200, 1772595, 8807624, 44087860, 218942205, 1093100404, 5447861031, 27173970577, 135547796845, 676389434363, 3374295032672, 16836823878509, 84007635799139, 419167042007303

Offset

1,2

Comments

Column 7 of A298139.

Links

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

Example

Some solutions for n=7
..0..0..1..0..1..1..1. .0..0..0..1..1..0..0. .0..0..1..0..0..1..1
..0..1..0..1..0..0..1. .1..0..1..1..0..1..0. .0..1..1..1..0..0..1
..0..1..0..1..0..1..0. .1..1..1..1..0..0..1. .1..0..0..0..1..0..1
..0..1..0..1..0..1..0. .1..0..0..1..1..1..1. .0..1..1..0..1..0..1
..0..1..0..1..0..1..0. .1..0..1..0..1..1..0. .0..0..1..0..1..0..1
..0..1..1..0..1..0..1. .0..1..1..0..1..0..0. .1..0..1..0..1..0..1
..0..0..0..0..0..1..1. .0..0..0..1..1..1..0. .1..1..0..1..0..1..1

Crossrefs

Cf. A298139.

Sequence in context: A037933 A350936 A297875 * A350935 A350132 A350934

Adjacent sequences: A298135 A298136 A298137 * A298139 A298140 A298141

Keyword

nonn

Author

R. H. Hardin, Jan 13 2018

Status

approved