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Search: id:A109723
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| A109723 |
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Sum of the first 2n+1 primes. |
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+0
2
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| 2, 10, 28, 58, 100, 160, 238, 328, 440, 568, 712, 874, 1060, 1264, 1480, 1720, 1988, 2276, 2584, 2914, 3266, 3638, 4028, 4438, 4888, 5350, 5830, 6338, 6870, 7418, 7982, 8582, 9206, 9854, 10538, 11240, 11966, 12718, 13490, 14288, 15116, 15968, 16840
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Bisection of A007504.
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FORMULA
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a(n) = A007504(2n+1).
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MATHEMATICA
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f[n_] := Sum[Prime[k], {k, n}]; Table[f[2n + 1], {n, 0, 42}]
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CROSSREFS
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Cf. A007504, A109722-A109726.
Sequence in context: A133479 A057753 A060515 this_sequence A053594 A006331 A104657
Adjacent sequences: A109720 A109721 A109722 this_sequence A109724 A109725 A109726
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 10 2005
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EXTENSIONS
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Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 11 2005
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