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A102486
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a(n) = 4*a(n-1) - 5*a(n-2).
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1
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2, 6, 14, 26, 34, 6, -146, -614, -1726, -3834, -6706, -7654, 2914, 49926, 185134, 490906, 1037954, 1697286, 1599374, -2088934, -16352606, -54965754, -138099986, -277571174, -419784766, -291283194, 933791054, 5191580186, 16097365474, 38431560966, 73239416494, 100799861146
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OFFSET
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0,1
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COMMENTS
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Inverse binomial transform is 2,4,4,0,-8,-16,-16,.. essentially -A146559(n+3). - R. J. Mathar, Apr 07 2022
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REFERENCES
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B. M. E. Moret and H. D. Shapiro, Algorithms from P to NP, Benjamin/Cummings, Vol. 1, 1991; p. 65.
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LINKS
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FORMULA
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MAPLE
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a := proc(n) option remember; if n = 0 then RETURN(2) end if; if n = 1 then RETURN(6) end if; 4*a(n - 1) - 5*a(n - 2); end proc;
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MATHEMATICA
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PROG
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(Magma) I:=[2, 6]; [n le 2 select I[n] else 4*Self(n-1)-5*Self(n-2): n in [1..40]]; // Vincenzo Librandi, Jan 15 2012
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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