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A251947
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Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime
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1
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4346, 3609, 8756, 25231, 87011, 285399, 875435, 3103838, 10096792, 31749014, 113723049, 368726042, 1185416828, 4275496283, 13829769780, 45301551569, 164329016957, 530458381091, 1763892629076, 6427277914092, 20713967166825
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 69*a(n-3) -1170*a(n-6) +2238*a(n-9) -57909*a(n-12) +222992*a(n-15) -1407264*a(n-18) +4017948*a(n-21) -19586465*a(n-24) +37664446*a(n-27) -93459214*a(n-30) +89190666*a(n-33) -1008083*a(n-36) -13979004*a(n-39) -3987484*a(n-42) +2116364*a(n-45) +401146*a(n-48) -128423*a(n-51) -852*a(n-54) for n>57
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EXAMPLE
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Some solutions for n=4
..1..1..0..1..1..0..1....2..0..0..2..3..0..2....1..1..0..1..1..3..1
..3..0..2..3..0..2..0....3..1..1..0..1..1..0....1..1..3..1..1..0..1
..1..1..0..1..1..0..1....0..1..1..3..1..1..0....0..0..2..0..3..2..0
..1..1..0..1..1..0..1....2..3..0..2..0..0..2....1..1..0..1..1..0..1
..0..0..2..3..0..2..3....0..1..1..0..1..1..0....1..1..0..1..1..0..1
..1..1..0..1..1..3..3....3..1..1..0..1..1..0....0..3..2..0..0..2..3
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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