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Search: id:A079266
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| A079266 |
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Subprimorials, extrapolation from primorials by analogy with subfactorials. |
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+0
2
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| 0, 1, 2, 11, 77, 850, 11047, 187806, 3568317, 82071280, 2380067130, 73782081030, 2729936998114, 111927416922654, 4812878927674125, 226205309600683885, 11988881408836245894, 707344003121338507758, 43147984190401648973266
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OFFSET
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0,3
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FORMULA
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a(n) = Round(Prime(n)#/e), where p# = p primorial, with Prime(0)# = 1.
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EXAMPLE
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a(3) = 11 because Prime(3) = 5, 5# = 30, 30/e = 11.036...
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MATHEMATICA
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Table[Round[Times @@ Prime@Range@n/E], {n, 18}] [From Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 30 2009]
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CROSSREFS
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Cf. A002110, A000166. See A121572 for a different definition of subprimorial.
Sequence in context: A110329 A006766 A120380 this_sequence A094569 A151418 A154273
Adjacent sequences: A079263 A079264 A079265 this_sequence A079267 A079268 A079269
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KEYWORD
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nonn
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AUTHOR
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Michael Joseph Halm (hierogamous(AT)lycos.com), Feb 05 2003
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EXTENSIONS
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Edited by Frank Adams-Watters (FrankTAW(AT)Netscape.net), Aug 08 2006
More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 30 2009
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