A304925 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.

64, 101, 466, 2510, 16158, 104451, 649029, 4123792, 26044218, 164807242, 1044534208, 6613431999, 41884985873, 265314965161, 1680416845681, 10643571331212, 67416006000459, 427006099213009, 2704626555301813

Offset

1,1

Comments

Column 7 of A304926.

Links

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

Example

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

Crossrefs

Cf. A304926.

Sequence in context: A303960 A304603 A305339 * A316419 A306165 A317382

Adjacent sequences: A304922 A304923 A304924 * A304926 A304927 A304928

Keyword

nonn

Author

R. H. Hardin, May 21 2018

Status

approved