A299815 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A299815

Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 39, 2101, 302780, 203062719, 506116118801, 4620961816405470, 155040688749828945595

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A299821.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

..0..0..0..0..0. .0..1..0..0..1. .0..0..0..0..1. .0..1..0..0..0

..0..0..0..0..0. .0..0..0..1..1. .0..0..0..0..0. .1..1..0..0..0

..0..0..0..0..0. .0..0..1..1..0. .1..0..1..1..1. .0..0..1..1..0

..1..1..1..0..1. .0..0..1..0..0. .1..1..1..1..1. .1..0..1..0..1

..0..1..0..0..0. .0..0..1..1..0. .1..0..1..1..1. .0..0..0..1..1

CROSSREFS

Cf. A299821.

Sequence in context: A253920 A156378 A220061 * A371557 A222366 A029538

Adjacent sequences: A299812 A299813 A299814 * A299816 A299817 A299818

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2018

STATUS

approved