A298069 Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

0, 54, 953, 13350, 302143, 7794251, 180902016, 4321153141, 102552409457, 2453761654793, 58598441957270, 1398559408845196, 33406481023496985, 797830290769560556, 19053436159307289623, 455043131244674608337

Offset

1,2

Comments

Column 7 of A298070.

Links

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

Example

Some solutions for n=4
..0..0..0..0..0..0..1. .0..0..1..0..0..0..0. .0..0..0..0..1..1..1
..0..0..1..1..0..1..1. .0..1..1..0..1..1..0. .0..1..1..1..0..0..1
..1..0..0..1..1..0..1. .0..1..1..0..1..0..1. .0..0..1..0..0..1..0
..1..1..0..0..0..1..1. .0..0..1..0..0..1..1. .0..1..1..1..1..0..0

Crossrefs

Cf. A298070.

Sequence in context: A247048 A280479 A107420 * A281776 A160345 A324952

Adjacent sequences: A298066 A298067 A298068 * A298070 A298071 A298072

Keyword

nonn

Author

R. H. Hardin, Jan 11 2018

Status

approved