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A143208
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A sequence based on odd numbers of the type 3*n + 2: a(n) = a(n - 1) + n - 1; A000096; f(n)=3*a(n)+2.
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0
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2, -1, 2, 8, 17, 29, 44, 62, 83, 107, 134, 164, 197, 233, 272, 314, 359, 407, 458, 512, 569, 629, 692, 758, 827, 899, 974, 1052, 1133, 1217, 1304, 1394, 1487, 1583, 1682, 1784, 1889, 1997, 2108, 2222, 2339, 2459, 2582, 2708, 2837, 2969, 3104, 3242, 3383, 3527, 3674
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..51.
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FORMULA
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a(n) = a(n - 1) + n - 1; A000096; f(n)=3*a(n)+2.
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MATHEMATICA
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a[0] = 0; a[1] = -1; a[n_] := a[n] = a[n - 1] + n - 1; a1 = Table[a[n], {n, 0, 30}]; f[n_] := 3*a[n] + 2; Table[f[n], {n, 0, 50}]
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CROSSREFS
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Cf. A000096.
Sequence in context: A221878 A219109 A137305 * A188664 A119419 A109529
Adjacent sequences: A143205 A143206 A143207 * A143209 A143210 A143211
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KEYWORD
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uned,sign
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AUTHOR
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Roger L. Bagula and Gary W. Adamson, Oct 20 2008
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STATUS
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approved
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