A251906 Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or 5

9552, 87472, 910694, 9385210, 97416802, 1020849168, 10715275730, 112555491252, 1183170494828, 12443858370610, 130926427024938, 1377879830335924, 14503761516792180, 152692922606927074, 1607716744587004974

Offset

1,1

Comments

Column 1 of A251909

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A271046 A162029 A251909 * A223367 A136476 A136479

Adjacent sequences: A251903 A251904 A251905 * A251907 A251908 A251909

Keyword

nonn

Author

R. H. Hardin, Dec 10 2014

Status

approved