A251786 Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7

3072, 6470, 16710, 44504, 130202, 362242, 1035154, 3188016, 9369766, 28509654, 91454234, 285327668, 914236522, 3029323780, 9884604370, 32777999406, 110731558818, 371180607532, 1254911990642, 4282512407420, 14558073177158

Offset

1,1

Comments

Column 3 of A251791

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above)

Example

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

Crossrefs

Sequence in context: A224116 A183726 A137485 * A334256 A262459 A205623

Adjacent sequences: A251783 A251784 A251785 * A251787 A251788 A251789

Keyword

nonn

Author

R. H. Hardin, Dec 08 2014

Status

approved