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A285023
Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.
0
0, 2, 97, 6460, 3708321, 5075612300, 40651048407879, 1063834786036208904, 129443742138071637706453
OFFSET
1,2
COMMENTS
Diagonal of A285030.
EXAMPLE
Some solutions for n=4
..0..1..0..1. .1..1..0..0. .0..1..0..1. .0..0..0..1. .0..1..1..1
..1..1..1..0. .1..1..0..1. .1..1..0..0. .0..1..0..0. .1..1..0..0
..0..0..0..1. .0..0..0..1. .1..1..0..0. .1..1..1..0. .0..0..1..0
..0..0..1..0. .0..0..1..1. .1..0..1..0. .0..1..0..1. .1..0..0..0
CROSSREFS
Cf. A285030.
Sequence in context: A233767 A223936 A224083 * A232865 A173837 A351447
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 08 2017
STATUS
approved