A296553 Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 3 or 6 neighboring 1s.

1, 1, 7, 17, 34, 62, 148, 347, 786, 1702, 3761, 8400, 18843, 41959, 93233, 207359, 462209, 1030065, 2293768, 5106282, 11371588, 25328516, 56410914, 125623824, 279760971, 623046005, 1387574808, 3090202195, 6882002941, 15326533700

Offset

1,3

Comments

Column 7 of A296554.

Links

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

Example

Some solutions for n=14
..0..1..1..0..0..1..1. .0..1..1..0..0..0..0. .0..0..1..1..0..0..0
..1..1..1..0..1..1..1. .1..1..1..0..0..0..0. .0..1..1..1..0..0..0
..1..1..0..0..1..1..0. .1..1..0..0..0..1..1. .0..1..1..0..0..1..1
..0..0..0..0..0..0..0. .0..0..0..0..1..1..1. .0..0..0..0..1..1..1
..0..0..0..0..0..0..0. .0..1..1..0..1..1..0. .0..1..1..0..1..1..0
..0..0..0..0..0..0..0. .1..1..1..0..0..0..0. .1..1..1..0..0..0..0
..0..0..0..0..0..0..0. .1..1..0..0..0..0..0. .1..1..0..0..1..1..0
..0..0..0..1..1..1..1. .0..0..0..0..0..1..1. .0..0..0..1..1..1..0
..0..0..1..1..0..1..1. .0..0..0..0..1..1..1. .0..0..0..1..1..0..0
..0..1..0..0..0..0..1. .0..1..1..0..1..1..0. .0..0..0..0..0..0..0
..1..1..0..0..0..1..1. .1..1..1..0..0..0..0. .0..0..0..0..0..0..0
..1..0..0..0..0..1..0. .1..1..0..1..1..0..0. .0..0..1..1..0..0..0
..1..1..0..1..1..0..0. .0..0..1..1..1..0..0. .0..1..1..1..0..0..0
..1..1..1..1..0..0..0. .0..0..1..1..0..0..0. .0..1..1..0..0..0..0

Crossrefs

Cf. A296554.

Sequence in context: A074275 A051411 A195016 * A101121 A212117 A160635

Adjacent sequences: A296550 A296551 A296552 * A296554 A296555 A296556

Keyword

nonn

Author

R. H. Hardin, Dec 15 2017

Status

approved