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A110337 a(n) = 2n+1 if 2n+1 is prime else a(n) = least prime of the form (2n+1)(2n+3)...(2n+2k-1) + 2. 0
3, 5, 7, 101, 11, 13, 257, 17, 19, 9454727, 23, 677, 801011, 29, 31, 42737, 1297, 37, 1601, 41, 43, 5285387, 47, 410006013351009077, 148667, 53, 3137, 14737907, 59, 64, 1529270318745462748663049625086428127 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

EXAMPLE

a(4) = 9*11+2= 101, as 9 is composite.

CROSSREFS

Cf. A110336.

Sequence in context: A082697 A051345 A104388 * A132287 A046201 A128344

Adjacent sequences:  A110334 A110335 A110336 * A110338 A110339 A110340

KEYWORD

nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 20 2005

EXTENSIONS

More terms from Victoria Sapko (vsapko(AT)frc.mass.edu), Sep 28 2007

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.