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A332034
Indices of A002182(n) in A055932.
2
1, 2, 3, 4, 6, 9, 12, 13, 15, 21, 26, 30, 36, 49, 53, 63, 72, 86, 114, 134, 149, 175, 194, 212, 221, 264, 274, 285, 332, 367, 424, 469, 505, 541, 620, 643, 687, 703, 808, 886, 1015, 1113, 1198, 1272, 1448, 1496, 1586, 1704, 1864, 1972, 2116, 2398, 2491, 2620, 2912
OFFSET
1,2
COMMENTS
A055932 lists numbers m whose prime divisors p are consecutive primes starting with 2, while A002182 is a subset of A025487, the latter lists numbers m that are products of primorials. With both, we find a range of indices of primes 1, 2, ..., k that divide m. While A055932 admits any multiplicity for primes regardless of their index, the latter only admits decreasing multiplicities as prime index k increases. A002182 is a subset of A025487, which is in turn a subset of A055932.
LINKS
MATHEMATICA
With[{s = TakeWhile[Import["https://oeis.org/A002182/b002182.txt", "Data"], Length@ # > 0 &][[All, -1]], t = TakeWhile[Import["https://oeis.org/A055932/b055932.txt", "Data"], Length@ # > 0 &][[All, -1]]}, TakeWhile[Map[FirstPosition[t, #][[1]] &, s], IntegerQ]]
CROSSREFS
Cf. A002182, A025487, A055932, A306802 (Indices of A002182(n) in A025487), A332035.
Sequence in context: A370843 A377151 A288734 * A332035 A318759 A018471
KEYWORD
nonn
AUTHOR
Michael De Vlieger, Feb 05 2020
STATUS
approved