A298840 Number of nX7 0..1 arrays with every element equal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 104, 2440, 60497, 3570731, 160441457, 7844725524, 380985444657, 18510417612668, 902275957883352, 43936865148320525, 2140933146128529606, 104313951368150470461, 5082784700709399173199, 247666770498486555848961

Offset

1,2

Comments

Column 7 of A298841.

Links

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

Example

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

Crossrefs

Cf. A298841.

Sequence in context: A273224 A092714 A297977 * A298628 A281536 A250684

Adjacent sequences: A298837 A298838 A298839 * A298841 A298842 A298843

Keyword

nonn

Author

R. H. Hardin, Jan 27 2018

Status

approved