A057714 Composite numbers m = Product p_i^{e_i} such that p_j^{e_j} < p_k^{e_k} for all p_j < p_k.

6, 10, 14, 15, 18, 20, 21, 22, 26, 28, 30, 33, 34, 35, 36, 38, 39, 42, 44, 46, 50, 51, 52, 54, 55, 57, 58, 62, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 82, 85, 86, 87, 88, 91, 92, 93, 94, 95, 98, 99, 100, 102, 104, 105, 106, 108, 110, 111, 114, 115, 116, 117, 118

Offset

1,1

Links

Lei Zhou, Table of n, a(n) for n = 1..10000

Example

140 is included because 140 = 2^2 * 5^1 * 7^1 and 2^2 < 5^1 < 7^1.

Mathematica

Select[Range[120], Less @@ Power @@@ (fi = FactorInteger[#]) && Length[fi] > 1 &] (* Ray Chandler, Nov 06 2008 *)

Crossrefs

Sequence in context: A357850 A085232 A085234 * A143907 A132982 A354922

Adjacent sequences: A057711 A057712 A057713 * A057715 A057716 A057717

Keyword

nonn

Author

Leroy Quet, Oct 24 2000

Extensions

Title clarified by Sean A. Irvine, Jun 24 2022

Status

approved