A298293 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

64, 301, 115, 448, 1084, 1798, 4679, 10688, 22503, 53875, 123435, 278930, 642076, 1469878, 3378674, 7738804, 17769468, 40807932, 93610115, 214883906, 493564409, 1132812315, 2601500535, 5974070555, 13717158924, 31501633865, 72344724752

Offset

1,1

Comments

Column 7 of A298294.

Links

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

Example

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

Crossrefs

Cf. A298294.

Sequence in context: A297699 A297888 A298493 * A299387 A299186 A299947

Adjacent sequences: A298290 A298291 A298292 * A298294 A298295 A298296

Keyword

nonn

Author

R. H. Hardin, Jan 16 2018

Status

approved