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Search: id:A111121
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| A111121 |
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a(n) = a(n-3)^3 + a(n-2)^2 + a(n-1); a(1) = -1, a(2) = 0, a(3) = 1. |
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+0
1
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| -1, 0, 1, 0, 1, 2, 3, 8, 25, 116, 1253, 30334, 3161239, 2890534072, 37908199848897, 39946852159641845000, 25587984997105954864555102857, 56071032677809871004962669691748664133130
(list; graph; listen)
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OFFSET
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1,6
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LINKS
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David Rock, Problem of the Week.
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EXAMPLE
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a(5)= a(2)^3 + a(3)^2 + a(4) = 0^3 + 1^2 + 0 = 1
a(9)= a(6)^3 + a(7)^2 + a(7) = 2^3 + 3^2 + 8 = 8 + 9 + 8 = 25
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MATHEMATICA
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a[1] = -1; a[2] = 0; a[3] = 1; a[n_] := a[n] = a[n - 3]^3 + a[n - 2]^2 + a[n - 1]; a /@ Range[20]
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CROSSREFS
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Sequence in context: A127905 A009224 A065619 this_sequence A107704 A041399 A041503
Adjacent sequences: A111118 A111119 A111120 this_sequence A111122 A111123 A111124
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KEYWORD
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sign
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AUTHOR
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Hamilton L. Hardison (HamiltonHardison(AT)gmail.com), Oct 15 2005
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Oct 17 2005
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