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 A098719 Position of prime(n)# in A025487. 10
 1, 2, 4, 9, 22, 54, 114, 246, 488, 948, 1809, 3327, 6020, 10624, 18246, 30726, 51148, 84074, 135598, 216398, 340886, 529051, 814237, 1240172, 1874464, 2817289, 4195918, 6186286, 9049492, 13121704, 18895821, 27199504, 38892092, 55318849, 78130780, 110028527 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS MATHEMATICA Block[{nn = 24, f, s}, f[n_] := {{1}}~Join~Block[{lim = Product[Prime@ i, {i, n}], ww = NestList[Append[#, 1] &, {1}, n - 1], g}, g[x_] := Apply[Times, MapIndexed[Prime[First@ #2]^#1 &, x]]; Map[Block[{w = #, k = 1}, Sort@ Prepend[If[Length@ # == 0, #, #[[1]]], Product[Prime@ i, {i, Length@ w}]] &@ Reap[Do[If[# < lim, Sow[#]; k = 1, If[k >= Length@ w, Break[], k++]] &@ g@ Set[w, If[k == 1, MapAt[# + 1 &, w, k], PadLeft[#, Length@ w, First@ #] &@ Drop[MapAt[# + Boole[i > 1] &, w, k], k - 1]]], {i, Infinity}]][[-1]]] &, ww]]; s = Sort[Join @@ f@ nn]; {1}~Join~Array[Position[s, Product[Prime@ i, {i, #}]] &, nn][[All, 1, 1]]] (* Michael De Vlieger, Jul 23 2018 *) CROSSREFS Cf. A002110, A025487. Sequence in context: A317735 A238826 A048211 * A274289 A265023 A343291 Adjacent sequences: A098716 A098717 A098718 * A098720 A098721 A098722 KEYWORD nonn AUTHOR Jeff Burch, Sep 29 2004 EXTENSIONS Extended by T. D. Noe, Nov 12 2010 More terms from Michael De Vlieger, Jul 23 2018 Name corrected by Amiram Eldar, Jun 05 2022 STATUS approved

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Last modified March 28 03:48 EDT 2023. Contains 361577 sequences. (Running on oeis4.)