A252367 Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7

3188, 17340, 124538, 818040, 5340334, 35124242, 230366506, 1511215256, 9934409558, 65227813792, 428045543104, 2810372935518, 18454316847202, 121160816335182, 795445333429948, 5222481881638938, 34288545449387208

Offset

1,1

Comments

Column 6 of A252369

Links

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

R. H. Hardin, Empirical recurrence of order 71

Formula

Empirical recurrence of order 71 (see link above)

Example

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

Crossrefs

Sequence in context: A324634 A115932 A187936 * A345589 A345847 A250386

Adjacent sequences: A252364 A252365 A252366 * A252368 A252369 A252370

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved