A318429 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 1634, 4095, 95349, 774731, 9600648, 99435165, 1103814944, 11993654843, 131130594420, 1434252580441, 15673240358415, 171453012097954, 1874658027499155, 20501732600130556, 224208780196235348

Offset

1,1

Comments

Column 7 of A318430.

Links

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

Example

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

Crossrefs

Cf. A318430.

Sequence in context: A160231 A213961 A317822 * A318097 A230913 A163017

Adjacent sequences: A318426 A318427 A318428 * A318430 A318431 A318432

Keyword

nonn

Author

R. H. Hardin, Aug 26 2018

Status

approved