A252322 Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6

12726, 94578, 723110, 5618854, 44203794, 348767254, 2755444362, 21800265534, 172528906186, 1365581241910, 10810960670358, 85592351487406, 677662650566558, 5365440165670510, 42481665945179918, 336356291724557310

Offset

1,1

Comments

Column 1 of A252325

Links

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

Example

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

Crossrefs

Sequence in context: A163573 A236882 A252325 * A254507 A254514 A254814

Adjacent sequences: A252319 A252320 A252321 * A252323 A252324 A252325

Keyword

nonn

Author

R. H. Hardin, Dec 16 2014

Status

approved