A252319 Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 3 6 or 7

28883, 10448, 62915, 409636, 2670867, 17562749, 115183853, 755608304, 4967205339, 32613907484, 214022772184, 1405186468315, 9227158424185, 60580408168259, 397722666715602, 2611240940820069, 17144272724694280

Offset

1,1

Comments

Column 6 of A252321

Links

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

R. H. Hardin, Empirical recurrence of order 80

Formula

Empirical recurrence of order 80 (see link above)

Example

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

Crossrefs

Sequence in context: A157610 A250011 A237727 * A237232 A031636 A364720

Adjacent sequences: A252316 A252317 A252318 * A252320 A252321 A252322

Keyword

nonn

Author

R. H. Hardin, Dec 16 2014

Status

approved