A252165 Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7

21186, 6883, 20753, 67674, 282255, 1007913, 3444924, 14647117, 52661401, 182127968, 775835591, 2811986165, 9812456922, 41719396939, 152097094855, 534426043974, 2266292784043, 8296983432537, 29306814934546, 123963603824937

Offset

1,1

Comments

Column 6 of A252167

Links

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

R. H. Hardin, Empirical recurrence of order 86

Formula

Empirical recurrence of order 86 (see link above)

Example

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

Crossrefs

Sequence in context: A273659 A109029 A284915 * A289674 A217265 A345563

Adjacent sequences: A252162 A252163 A252164 * A252166 A252167 A252168

Keyword

nonn

Author

R. H. Hardin, Dec 14 2014

Status

approved