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 A079266 Subprimorials, extrapolation from primorials by analogy with subfactorials. 2
 0, 1, 2, 11, 77, 850, 11047, 187806, 3568317, 82071280, 2380067130, 73782081030, 2729936998114, 111927416922654, 4812878927674125, 226205309600683885, 11988881408836245894, 707344003121338507758, 43147984190401648973266 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Table of n, a(n) for n=0..18. FORMULA a(n) = Round(Prime(n)#/e), where p# = p primorial, with Prime(0)# = 1. EXAMPLE a(3) = 11 because Prime(3) = 5, 5# = 30, 30/e = 11.036... MATHEMATICA Table[Round[Times @@ Prime@Range@n/E], {n, 18}] (* Robert G. Wilson v, Apr 30 2009 *) Join[{0}, Round[FoldList[Times, Prime[Range[20]]]/E]] (* Harvey P. Dale, Oct 22 2023 *) CROSSREFS Cf. A002110, A000166. See A121572 for a different definition of subprimorial. Sequence in context: A006766 A120380 A369542 * A094569 A151418 A154273 Adjacent sequences: A079263 A079264 A079265 * A079267 A079268 A079269 KEYWORD nonn AUTHOR Michael Joseph Halm, Feb 05 2003 EXTENSIONS Edited by Franklin T. Adams-Watters, Aug 08 2006 More terms from Robert G. Wilson v, Apr 30 2009 STATUS approved

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Last modified August 7 09:20 EDT 2024. Contains 375010 sequences. (Running on oeis4.)