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A349260
a(n) is the least number k such that A349258(k) = n.
2
1, 2, 6, 8, 24, 120, 216, 128, 384, 1920, 3456, 17280, 120960, 432000, 279936, 32768, 98304, 491520, 884736, 4423680, 30965760, 110592000, 71663616, 358318080, 2508226560, 8957952000, 62705664000, 689762304000, 3072577536000, 5598720000000, 470184984576, 2147483648
OFFSET
0,2
LINKS
EXAMPLE
a(2) = 6 since A349258(6) = 2 and A349258(k) != 2 for all k < 6.
MATHEMATICA
f[p_, e_] := 2^DigitCount[e, 2, 1] - 1; d[1] = 0; d[n_] := Plus @@ f @@@ FactorInteger[n]; seq[len_, nmax_] := Module[{s = Table[0, {len}], k = 0, n = 1, i}, While[k < len && n < nmax, i = d[n] + 1; If[i <= len && s[[i]] == 0, k++; s[[i]] = n]; n++]; TakeWhile[s, # > 0 &]]; seq[15, 10^6]
CROSSREFS
Sequence in context: A122756 A193946 A349259 * A189850 A189358 A116083
KEYWORD
nonn
AUTHOR
Amiram Eldar, Nov 12 2021
STATUS
approved