A252432 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7

6941, 10309, 38186, 151863, 652210, 2718502, 10924203, 47376966, 196667998, 788158275, 3419420671, 14214579202, 56964813491, 246973156585, 1027497174397, 4117359629923, 17846591172785, 74293698105294, 297651191468217

Offset

1,1

Comments

Column 7 of A252433

Links

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

Example

Some solutions for n=4
..2..2..3..2..2..0..2..2..0....2..0..2..2..3..2..2..3..2
..1..3..3..1..3..3..1..3..3....3..3..1..3..3..1..3..3..1
..2..0..2..2..3..2..2..3..2....0..2..2..3..2..2..3..2..2
..2..2..3..2..2..3..2..2..3....2..3..2..2..3..2..2..0..2
..1..3..3..1..3..3..1..0..3....3..3..1..3..0..1..3..3..1
..2..3..2..2..0..2..2..3..2....0..2..2..3..2..2..0..2..2

Crossrefs

Sequence in context: A004245 A195280 A059462 * A072870 A183666 A252368

Adjacent sequences: A252429 A252430 A252431 * A252433 A252434 A252435

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved