A300688 - OEIS

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A300688

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

8, 981, 37100, 1242620, 42006289, 1431755828, 48809162176, 1662541314220, 56619912876077, 1928366919064951, 65677923512122208, 2236900077280881002, 76185693577077136760, 2594778452806336608700, 88374539564630929465907

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 7 of A300689.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..0..0..0..0..0. .0..0..0..0..0..1..0. .0..0..0..0..0..0..1

..0..1..1..1..0..1..0. .0..1..1..0..1..0..1. .0..1..1..0..1..1..1

..0..0..1..0..1..0..1. .0..0..0..1..1..1..0. .0..0..0..1..0..0..0