A297822 Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 king-move adjacent elements, with upper left element zero.

8, 1933, 3124, 13417, 43931, 146530, 467104, 1485611, 4742326, 15121792, 48148189, 153781266, 492324793, 1577859150, 5058924132, 16225860490, 52059118956, 167096376917, 536508689557, 1723053505342, 5534994384618, 17783715046733

Offset

1,1

Comments

Column 7 of A297823.

Links

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

Example

Some solutions for n=6
..0..1..0..1..1..0..0. .0..0..0..0..0..1..0. .0..0..0..0..0..0..0
..0..1..0..1..0..1..0. .0..1..1..1..1..0..1. .1..1..1..1..1..1..0
..1..1..0..1..0..1..0. .0..1..0..0..1..0..1. .0..0..0..0..0..0..1
..0..1..0..1..0..1..1. .0..1..0..1..0..0..1. .0..1..1..1..1..1..0
..0..1..0..1..0..1..0. .1..1..0..1..1..1..0. .1..0..0..0..0..0..1
..1..1..0..1..1..0..0. .0..0..1..0..0..0..0. .1..1..0..1..1..0..1

Crossrefs

Cf. A297823.

Sequence in context: A160302 A002672 A027515 * A297992 A298845 A298652

Adjacent sequences: A297819 A297820 A297821 * A297823 A297824 A297825

Keyword

nonn

Author

R. H. Hardin, Jan 06 2018

Status

approved