A316875 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

64, 1709, 36900, 871345, 19933839, 486546897, 11836970493, 286716424150, 6977675255288, 170015938697302, 4138167646465313, 100724821265896610, 2452502487475584970, 59712288213161682740, 1453740520399913939989

Offset

1,1

Comments

Column 7 of A316876.

Links

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

Example

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

Crossrefs

Cf. A316876.

Sequence in context: A317124 A305592 A317010 * A317603 A269660 A234240

Adjacent sequences: A316872 A316873 A316874 * A316876 A316877 A316878

Keyword

nonn

Author

R. H. Hardin, Jul 15 2018

Status

approved