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A066495
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Numbers n such that f(n) = f(n-1)+f(n-2) where f denotes the prime gaps function given by f(m) = p(m+1)-p(m) and p(m) denotes the m-th prime.
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2
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4, 9, 15, 21, 51, 71, 118, 184, 208, 227, 231, 238, 255, 267, 290, 317, 326, 354, 381, 392, 396, 437, 494, 499, 544, 553, 569, 627, 645, 660, 720, 756, 796, 922, 932, 937, 960, 968, 990, 1027, 1034, 1087, 1103, 1130, 1157, 1173, 1175, 1227, 1237, 1251
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| f(9) = 6 = 4 + 2 = f(8) + f(7); so 9 is a member of a(n).
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MATHEMATICA
| f[n_] := Prime[n + 1] - Prime[n]; Select[Range[3, 10^4], f[ # ] == f[ # - 1] + f[ # - 2] &]
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CROSSREFS
| Cf. A001223, A109226.
Sequence in context: A103393 A103392 A073046 * A134227 A055999 A022945
Adjacent sequences: A066492 A066493 A066494 * A066496 A066497 A066498
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KEYWORD
| nonn
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AUTHOR
| Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Jan 03 2002
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 23 2005
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