A298319 Number of nX7 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

21, 203, 94, 1086, 6236, 11175, 111137, 644056, 3190955, 27151266, 182045025, 1280285105, 10257252946, 75063403838, 571967578126, 4496402709938, 34098604190424, 264284131602151, 2063855052770201, 15872082370425994

Offset

1,1

Comments

Column 7 of A298320.

Links

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

Example

Some solutions for n=7
..0..1..1..1..1..0..1. .0..1..0..0..1..0..0. .0..1..0..1..0..1..0
..1..0..1..0..0..0..0. .1..0..0..0..0..0..0. .1..1..1..1..1..1..1
..1..1..1..1..1..1..0. .1..1..1..1..1..1..1. .0..1..0..1..0..1..0
..1..1..0..0..1..1..0. .1..0..0..1..0..1..1. .1..1..1..0..0..0..1
..0..0..0..0..0..0..0. .0..1..0..0..0..0..0. .1..1..1..1..0..1..1
..1..1..1..1..1..0..1. .1..1..1..0..0..0..0. .0..0..1..1..0..1..1
..0..0..1..0..1..1..0. .0..1..0..1..0..1..1. .0..0..0..0..0..0..0

Crossrefs

Cf. A298320.

Sequence in context: A126542 A297906 A298500 * A299392 A299193 A300029

Adjacent sequences: A298316 A298317 A298318 * A298320 A298321 A298322

Keyword

nonn

Author

R. H. Hardin, Jan 17 2018

Status

approved