A298718 Number of nX7 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 54, 1005, 13650, 309593, 8287084, 193439202, 4672566734, 112689610775, 2731899175896, 66122998854098, 1599672498018255, 38731486336940251, 937609098603118557, 22696092440623817595, 549420999860489552558

Offset

1,2

Comments

Column 7 of A298719.

Links

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

Example

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

Crossrefs

Cf. A298719.

Sequence in context: A281776 A160345 A324952 * A245832 A121625 A341940

Adjacent sequences: A298715 A298716 A298717 * A298719 A298720 A298721

Keyword

nonn

Author

R. H. Hardin, Jan 25 2018

Status

approved