A297977 Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

0, 104, 2410, 60427, 3565760, 160132152, 7833283900, 380347270776, 18479502350618, 900718473284558, 43858541975987311, 2137007759512119065, 104116892327060952223, 5072908488571026582866, 247172021246746231328931

Offset

1,2

Comments

Column 7 of A297978.

Links

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

Example

Some solutions for n=4
..0..0..1..0..0..1..1. .0..0..1..1..0..1..1. .0..0..0..1..1..0..0
..0..1..0..1..1..0..1. .1..0..1..1..0..0..1. .0..0..1..0..0..1..0
..0..1..1..0..0..1..0. .1..1..0..0..1..1..0. .1..1..0..1..1..0..0
..0..0..0..1..1..0..0. .1..1..0..1..1..0..0. .1..1..1..1..1..0..0

Crossrefs

Cf. A297978.

Sequence in context: A186931 A273224 A092714 * A298840 A298628 A281536

Adjacent sequences: A297974 A297975 A297976 * A297978 A297979 A297980

Keyword

nonn

Author

R. H. Hardin, Jan 10 2018

Status

approved