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A099993 Bisection of A025487. 1
2, 6, 12, 24, 32, 48, 64, 96, 128, 180, 210, 240, 288, 384, 432, 512, 720, 840, 900, 1024, 1152, 1296, 1536, 1728, 1920, 2160, 2310, 2592, 3072, 3456, 3840, 4320, 4620, 5184, 5760, 6300, 6720, 7200, 7680, 8192, 9216, 10080, 10800, 12288, 12960, 13824, 14400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A025487: least integer of each prime signature; also products of primorial numbers A002110. - Robert G. Wilson v, Dec 14 2005

LINKS

Table of n, a(n) for n=1..47.

MATHEMATICA

PrimeExponents[n_] := Last /@ FactorInteger@n; lpe = {}; ln = {1}; Do[ pe = Sort@PrimeExponents@n; If[FreeQ[lpe, pe], AppendTo[lpe, pe]; AppendTo[ln, n]], {n, 15000}]; ln[[2# ]] & /@ Range@(Length@ln/2) (* Robert G. Wilson v *)

CROSSREFS

Cf. A099992.

Sequence in context: A129314 A137895 A194096 * A011778 A067718 A210594

Adjacent sequences:  A099990 A099991 A099992 * A099994 A099995 A099996

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Nov 20 2004

EXTENSIONS

More terms from Robert G. Wilson v, Dec 14 2005

STATUS

approved

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Last modified March 25 22:28 EDT 2019. Contains 321477 sequences. (Running on oeis4.)