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A190099
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Number of 1:2:sqrt(5) proportioned triangles on a (n+1)X(n+1) grid
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1
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0, 16, 64, 176, 384, 744, 1288, 2104, 3224, 4776, 6784, 9408, 12672, 16776, 21736, 27792, 34944, 43488, 53400, 65032, 78336, 93720, 111112, 130976, 153216, 178360, 206272, 237552, 272024, 310368, 352360, 398752, 449280, 504776, 564928, 630648
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OFFSET
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1,2
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COMMENTS
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Diagonal of A190100
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..103
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FORMULA
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Empirical: a(n) = a(n-1) +2*a(n-2) -2*a(n-3) +a(n-5) -3*a(n-6) +3*a(n-8) -a(n-9) +2*a(n-11) -2*a(n-12) -a(n-13) +a(n-14)
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EXAMPLE
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Some solutions for n=5
..3..0....3..2....5..0....2..0....1..2....5..5....3..5....3..0....2..3....0..4
..1..0....2..1....3..0....1..1....1..0....1..5....2..4....2..1....0..3....1..5
..3..1....5..0....5..1....4..2....5..2....5..3....5..3....5..2....2..2....2..2
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CROSSREFS
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Sequence in context: A102860 A136264 A100184 * A059165 A212506 A212512
Adjacent sequences: A190096 A190097 A190098 * A190100 A190101 A190102
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin May 04 2011
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STATUS
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approved
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