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A252577
Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7
1
890, 1558, 4168, 9051, 30532, 92725, 208375, 715437, 2196824, 4932817, 17087917, 52719076, 118137939, 412475333, 1277261765, 2857270465, 10039630707, 31180060771, 69654819267, 245981412469, 765710684488, 1708718651733
OFFSET
1,1
COMMENTS
Row 3 of A252574
LINKS
FORMULA
Empirical: a(n) = 46*a(n-3) -572*a(n-6) +1298*a(n-9) -3089*a(n-12) +4222*a(n-15) -3472*a(n-18) +3104*a(n-21) -1536*a(n-24) for n>32
EXAMPLE
Some solutions for n=4
..0..0..2..0..0..2....1..3..2..2..3..1....1..0..0..2..0..0....0..2..0..0..2..0
..3..1..2..3..2..2....0..0..1..0..0..2....2..3..1..2..3..2....0..0..2..0..0..2
..0..2..0..0..1..0....2..0..0..2..0..0....0..0..2..0..0..1....3..2..2..3..2..1
..0..0..2..0..0..2....2..3..2..2..3..2....2..0..0..1..0..0....0..1..0..0..2..0
..3..2..2..3..2..1....0..0..1..0..0..1....2..3..2..2..3..2....1..0..1..0..0..2
CROSSREFS
Sequence in context: A231954 A224338 A250513 * A202528 A006916 A128871
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2014
STATUS
approved