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Search: id:A136612
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| A136612 |
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((Prime(n+3) + prime(n+1)) - (prime(n+2) + prime(n))). |
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+0
1
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| 3, 6, 4, 8, 4, 8, 8, 6, 12, 6, 8, 8, 8, 10, 8, 12, 6, 8, 10, 6, 12, 12, 10, 10, 8, 4, 8, 16, 8, 20, 6, 16, 4, 16, 8, 10, 12, 10, 8, 16, 4, 14, 4, 16, 14, 16, 14, 8, 8, 6, 16, 8, 16, 12, 8, 12, 6, 8, 14, 16, 14, 16, 8, 16, 10, 24, 8, 14, 8, 12, 12, 14, 10, 12, 12, 10, 16, 14, 10, 20, 4, 16, 6
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A001223(n)+A001223(n+2). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 21 2008
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EXAMPLE
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2 + 5 = 7
3 + 7 = 10
5 + 11 = 16
7 + 13 = 20
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so the sequence is: 10 - 7 = 3,
16 - 10 = 6,
20 - 16 = 4,
28 - 20 = 8,
...
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MAPLE
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A001223 := proc(n) ithprime(n+1)-ithprime(n) ; end: A136612 := proc(n) A001223(n)+A001223(n+2) ; end: seq(A136612(n), n=1..100) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 21 2008
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CROSSREFS
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Cf. A000040.
Adjacent sequences: A136609 A136610 A136611 this_sequence A136613 A136614 A136615
Sequence in context: A090963 A112374 A093064 this_sequence A004546 A100000 A083682
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KEYWORD
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easy,nonn
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AUTHOR
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Odimar Fabeny (aifab(AT)yahoo.com.br), Apr 14 2008
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EXTENSIONS
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Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 21 2008
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