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A284215
Number of n X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
1
1, 6, 70, 6511, 2417194, 3945536189, 26772321109067, 749608559151363940, 85781667864838421304454, 39910247433142071128719168435, 75224282551539452957156354090109083
OFFSET
1,2
COMMENTS
Diagonal of A284222.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..1. .0..1..1..0. .0..1..1..0. .0..1..1..0. .0..1..1..1
..0..1..1..1. .1..0..1..1. .0..1..0..1. .0..1..1..1. .0..0..1..0
..0..1..1..1. .1..0..0..0. .1..0..1..0. .0..1..1..0. .0..1..0..1
..0..0..1..1. .0..1..1..0. .0..1..1..0. .0..1..0..0. .1..1..1..0
CROSSREFS
Cf. A284222.
Sequence in context: A365057 A182563 A211036 * A050788 A241883 A297746
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 23 2017
STATUS
approved