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Search: id:A072110
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| A072110 |
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a(n) = 4*a(n-1) - a(n-2) - 2, with a(0)=1, a(1)=2. |
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+0
2
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| 1, 2, 5, 16, 57, 210, 781, 2912, 10865, 40546, 151317, 564720, 2107561, 7865522, 29354525, 109552576, 408855777, 1525870530, 5694626341, 21252634832, 79315912985, 296011017106, 1104728155437, 4122901604640, 15386878263121
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OFFSET
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0,2
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MATHEMATICA
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a[0] = 1; a[1] = 2; a[n_] := a[n] = 4*a[n - 1] - a[n - 2] - 2; Table[ a[n], {n, 0, 25} ]
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PROGRAM
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sage: [lucas_number1(n, 4, 1)+1 for n in range(26)] - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 06 2008
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CROSSREFS
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a(n) = A071954(n)/2 = A001353(n) + 1.
Sequence in context: A052891 A052815 A082789 this_sequence A114296 A121689 A009225
Adjacent sequences: A072107 A072108 A072109 this_sequence A072111 A072112 A072113
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 30 2002
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