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A252471
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 5 6 or 8
1
8624, 9056, 62391, 409090, 2670237, 17562191, 115183323, 755607698, 4967204849, 32613906966, 214022771622, 1405186467829, 9227158423671, 60580408167661, 397722666715044, 2611240940819539, 17144272724693674, 112560751779945208
OFFSET
1,1
COMMENTS
Column 6 of A252473
FORMULA
Empirical recurrence of order 72 (see link above)
EXAMPLE
Some solutions for n=3
..3..3..1..3..3..3..3..3....3..3..1..3..3..3..1..3....1..3..3..3..3..1..3..3
..1..3..3..3..3..3..3..3....1..3..3..3..3..3..3..3....3..3..1..3..3..3..3..1
..3..3..3..1..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..1..3..3....3..3..3..1..3..3..3..3....3..3..3..1..3..3..1..3
..3..3..1..3..3..3..3..3....3..3..3..3..3..3..3..1....3..1..3..3..3..3..3..3
CROSSREFS
Sequence in context: A370970 A116326 A031809 * A250589 A190467 A057658
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved