A303247 Number of 7Xn 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 21, 1465, 458, 23995, 41878, 686376, 4288552, 44547581, 435326091, 4420070682, 46247239309, 488935478096, 5159966424970, 55400725550050, 589318077173963, 6332575656503077, 67765552380120662, 727276471899440959

Offset

1,1

Comments

Row 7 of A303242.

Links

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

Example

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

Crossrefs

Cf. A303242.

Sequence in context: A316692 A302217 A302465 * A302373 A303089 A302894

Adjacent sequences: A303244 A303245 A303246 * A303248 A303249 A303250

Keyword

nonn

Author

R. H. Hardin, Apr 20 2018

Status

approved