Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A030641
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A030641 a(1) = 6; for n > 1, a(n) = product of next 2 primes after a(n-1). +0
2
6, 77, 6557, 43112347, 1858675670994257, 3454675249946148511864052376019, 11934781082590483693525046199489720199194471433440678070422853 (list; graph; listen)
OFFSET

1,1

EXAMPLE

The 2 primes after 77 are 79, 83, so next term is 79*83 = 6557.

MAPLE

f := n->nextprime(n)*nextprime(nextprime(n));

CROSSREFS

Cf. A000040, A030642.

Sequence in context: A082629 A154642 A154645 this_sequence A116280 A134788 A167498

Adjacent sequences: A030638 A030639 A030640 this_sequence A030642 A030643 A030644

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


AT&T Labs Research