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A116360 Smallest number having exactly n partitions into products of two successive primes (A006094), or -1 if no such number exists. 5
1, 6, 30, 60, 90, 105, 120, 135, 143, 158, 155, 167, 173, 182, 185, 207, 197, 203, 212, 215, 221, 231, 227, 233, 239, 242, 256, 245, 251, 261, 257, 260, 263, 266, 282, 272, 275, 278, 281, 291, -1, 287, 290, 293, 296, 309, 312, 302, 305, 319, 308, 314, -1, 317, 322, 320 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

If a(n) <> -1: A116357(a(n))=n and A116357(m)<>n for m<n.

LINKS

Table of n, a(n) for n=0..55.

EXAMPLE

Without proof: a(40) = -1 and a(52) = -1.

CROSSREFS

Sequence in context: A024365 A057229 A120734 * A065800 A181827 A263573

Adjacent sequences:  A116357 A116358 A116359 * A116361 A116362 A116363

KEYWORD

sign

AUTHOR

Reinhard Zumkeller, Feb 12 2006

EXTENSIONS

Edited by D. S. McNeil, Sep 06 2010

STATUS

approved

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Last modified June 19 12:57 EDT 2019. Contains 324222 sequences. (Running on oeis4.)