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A252137
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7
2
1864, 8684, 62277, 409028, 2670175, 17562129, 115183261, 755607636, 4967204787, 32613906904, 214022771560, 1405186467767, 9227158423609, 60580408167599, 397722666714982, 2611240940819477, 17144272724693612, 112560751779945146
OFFSET
1,1
COMMENTS
Column 6 of A252139
FORMULA
Empirical recurrence of order 72 (see link above)
EXAMPLE
Some solutions for n=3
..3..3..3..2..3..3..3..3....3..3..2..3..3..3..2..3....2..3..3..3..3..3..3..2
..3..2..3..3..3..2..3..3....3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..3
..3..3..3..3..3..3..3..3....3..2..3..3..3..2..3..3....3..3..3..2..3..3..2..3
..3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..2....3..2..3..3..3..3..3..3
..3..3..2..3..3..3..3..3....2..3..3..3..3..3..2..0....3..3..3..3..3..3..3..3
CROSSREFS
Sequence in context: A054815 A295995 A237257 * A204889 A204885 A231029
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 14 2014
STATUS
approved