A252350 Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8

7109, 29159, 111519, 425816, 2400740, 11021412, 49182987, 274849809, 1296591297, 5991019950, 32860137008, 156858856774, 738121931124, 3993260696684, 19234679231972, 91617107661579, 490772694795537, 2380233854933985

Offset

1,1

Comments

Column 6 of A252352

Links

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

R. H. Hardin, Empirical recurrence of order 82

Formula

Empirical recurrence of order 82 (see link above)

Example

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

Crossrefs

Sequence in context: A357478 A189354 A252383 * A251948 A269040 A325066

Adjacent sequences: A252347 A252348 A252349 * A252351 A252352 A252353

Keyword

nonn

Author

R. H. Hardin, Dec 16 2014

Status

approved