A297992 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

8, 1933, 3820, 14888, 62390, 290466, 1276012, 5745438, 26249179, 117931466, 529767543, 2397639048, 10849215458, 49036526523, 221822852403, 1003695687810, 4540550678347, 20545128422585, 92986082536821, 420869471627171

Offset

1,1

Comments

Column 7 of A297993.

Links

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

Example

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

Crossrefs

Cf. A297993.

Sequence in context: A002672 A027515 A297822 * A298845 A298652 A299606

Adjacent sequences: A297989 A297990 A297991 * A297993 A297994 A297995

Keyword

nonn

Author

R. H. Hardin, Jan 10 2018

Status

approved