A300798 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 8, 228, 23096, 8170504, 10189867088, 44678859224720, 689135333800118172, 37384922495789864734248, 7133341171604127356105213188, 4787286947598320962893540775519384

Offset

1,2

Comments

Diagonal of A300804.

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

Example

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

Crossrefs

Cf. A300804.

Sequence in context: A317559 A302735 A300209 * A240299 A222525 A214351

Adjacent sequences: A300795 A300796 A300797 * A300799 A300800 A300801

Keyword

nonn

Author

R. H. Hardin, Mar 13 2018

Status

approved