A252084 Number of (n+2)X(4+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 or 4

687, 2595, 11186, 47266, 199064, 846257, 3603209, 15363231, 65536806, 279433103, 1191679629, 5083746174, 21686819544, 92508524702, 394621790278, 1683414777634, 7181262271286, 30634453136010, 130683641418097

Offset

1,1

Comments

Column 4 of A252088

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above)

Example

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

Crossrefs

Sequence in context: A045150 A296811 A252642 * A211162 A235851 A057116

Adjacent sequences: A252081 A252082 A252083 * A252085 A252086 A252087

Keyword

nonn

Author

R. H. Hardin, Dec 13 2014

Status

approved