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A252465
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8
0
570, 682, 1741, 22832, 504030, 17562191, 937980722, 77093723656, 9818091214865, 1923038551366846, 579363831610999723, 269256446506102900730, 192945586040744107579747, 212997867807414690141275405
OFFSET
1,1
COMMENTS
Diagonal of A252473
EXAMPLE
Some solutions for n=4
..1..3..3..3..1..3....3..3..3..3..1..3....1..3..3..1..3..3....3..1..3..3..1..3
..3..3..3..3..3..1....3..3..1..3..3..3....3..3..3..3..3..1....3..3..3..3..3..1
..3..3..3..3..3..3....3..3..3..3..3..3....3..3..3..3..3..3....1..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..3..3..3..3
..3..3..3..3..3..3....1..3..3..3..3..1....1..3..3..3..3..3....3..3..3..3..3..1
..3..3..1..3..3..1....3..1..3..3..1..3....3..1..3..3..3..3....1..3..3..1..3..3
CROSSREFS
Sequence in context: A263708 A219992 A221218 * A252473 A252466 A097035
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved