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A284106 Number of nXn 0..1 arrays with the number of 1s king-move adjacent to some 0 equal to the number of 0s adjacent to some 1, with top left element zero. 0
1, 4, 25, 5896, 905327, 3514396333, 12336109217951, 635264284970617848, 46214926085757662096414 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A284113.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A284113.

Sequence in context: A144229 A316926 A317699 * A063802 A276266 A276268

Adjacent sequences:  A284103 A284104 A284105 * A284107 A284108 A284109

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 20 2017

STATUS

approved

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Last modified May 26 13:05 EDT 2019. Contains 323586 sequences. (Running on oeis4.)