A299667 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

64, 7181, 243312, 9424684, 383819990, 15351583824, 613943466291, 24660009931840, 990036737595402, 39740436675211431, 1595652867729124993, 64070413955951330785, 2572591332870145665288, 103297979695217842684110

Offset

1,1

Comments

Column 7 of A299668.

Links

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

Example

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

Crossrefs

Cf. A299668.

Sequence in context: A299843 A299000 A299745 * A300258 A180377 A013995

Adjacent sequences: A299664 A299665 A299666 * A299668 A299669 A299670

Keyword

nonn

Author

R. H. Hardin, Feb 15 2018

Status

approved