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Search: id:A121364
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| 0, 0, 1, 2, 3, 6, 10, 18, 29, 50, 81, 136, 220, 364, 589, 966, 1563, 2550, 4126, 6710, 10857, 17622, 28513, 46224, 74792, 121160, 196041, 317434, 513619, 831430, 1345282, 2177322, 3522981, 5701290, 9224881, 14927768, 24153636, 39083988
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OFFSET
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1,4
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COMMENT
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The convolution of 1,0,1,1,1,3,3,7,9,17,25,... (A066983 with 1,0 added to the front) with "A double Fibonacci sequence" (A103609) is the Fibonacci sequence (A000045), with an extra initial 0.
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FORMULA
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a(n) = F(n) - D(n+1), where F is the Fibonacci sequence (A000045), and D is "A double Fibonacci sequence" (A103609)
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EXAMPLE
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a(7)=10 because F(7)=13 and D(8)=3, and a(7)=F(7)-D(8)
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CROSSREFS
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Cf. A066983, A103609, A000045.
Sequence in context: A065441 A075531 A066067 this_sequence A102702 A060945 A077930
Adjacent sequences: A121361 A121362 A121363 this_sequence A121365 A121366 A121367
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KEYWORD
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nonn
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AUTHOR
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Graeme McRae (g_m(AT)mcraefamily.com), Jul 23 2006
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