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 A324694 Lexicographically earliest sequence of positive integers divisible by prime(m) for some m not already in the sequence. 39
 2, 4, 5, 6, 8, 10, 12, 14, 15, 16, 17, 18, 20, 22, 23, 24, 25, 26, 28, 30, 31, 32, 34, 35, 36, 38, 40, 41, 42, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 58, 60, 62, 64, 65, 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 78, 80, 82, 84, 85, 86, 88, 90, 92, 93, 94, 95 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A self-describing sequence, similar to A304360. A prime index of n is a number m such that prime(m) divides n. The multiset of prime indices of n is row n of A112798. LINKS EXAMPLE The sequence of terms together with their prime indices begins:    2: {1}    4: {1,1}    5: {3}    6: {1,2}    8: {1,1,1}   10: {1,3}   12: {1,1,2}   14: {1,4}   15: {2,3}   16: {1,1,1,1}   17: {7}   18: {1,2,2}   20: {1,1,3}   22: {1,5}   23: {9}   24: {1,1,1,2}   25: {3,3}   26: {1,6}   28: {1,1,4}   30: {1,2,3} MATHEMATICA aQ[n_]:=!And@@Cases[If[n==1, {}, FactorInteger[n]], {p_, k_}:>aQ[PrimePi[p]]]; Select[Range[100], aQ] CROSSREFS Complement of A324695. Cf. A000002, A000720, A001222, A001462, A007097, A055396, A061395, A079000, A079254, A109298, A112798, A276625, A277098, A304360. Cf. A324696, A324697, A324698, A324699, A324700, A324701, A324702, A324703, A324704, A324705. Sequence in context: A026441 A047434 A062414 * A249025 A065502 A077255 Adjacent sequences:  A324691 A324692 A324693 * A324695 A324696 A324697 KEYWORD nonn AUTHOR Gus Wiseman, Mar 10 2019 STATUS approved

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Last modified May 30 05:35 EDT 2020. Contains 334712 sequences. (Running on oeis4.)