A234864 Number of (n+2) X (3+2) 0..3 arrays with each 3 X 3 subblock having the sum of its 72 absolute element differences equal to 52, and no adjacent elements equal.

61954, 272878, 1241772, 6113796, 33431812, 192846644, 1129155378, 6882784048, 43546591390, 271469433824, 1733428722048, 11349225086910, 72370907554790, 470247936237146, 3116595409983744, 20033051082617520, 130971235426879114

Offset

1,1

Comments

Column 3 of A234867.

Links

R. H. Hardin, Table of n, a(n) for n = 1..104

Example

Some solutions for n=1
..1..0..3..0..3....1..0..3..1..3....2..0..3..1..2....2..3..1..2..1
..3..2..1..2..1....2..1..0..3..2....1..3..0..2..3....1..0..3..0..3
..1..0..3..1..0....0..2..3..2..0....3..2..1..3..0....3..1..0..2..0

Crossrefs

Cf. A234867.

Sequence in context: A257749 A340126 A112015 * A128879 A234149 A214147

Adjacent sequences: A234861 A234862 A234863 * A234865 A234866 A234867

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved