A316821 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

64, 5912, 191692, 7609680, 321003969, 12835573991, 521608116975, 21245308955509, 862069068522225, 35027487730223607, 1423282380580015530, 57818327223393828542, 2349018246981367704492, 95434328394406945094231

Offset

1,1

Comments

Column 7 of A316822.

Links

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

Example

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

Crossrefs

Cf. A316822.

Sequence in context: A317117 A305529 A317003 * A317571 A240346 A009823

Adjacent sequences: A316818 A316819 A316820 * A316822 A316823 A316824

Keyword

nonn

Author

R. H. Hardin, Jul 14 2018

Status

approved