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A118332 Primes of the form n!! + (n+1)!!. 1
2, 3, 5, 11, 23 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

These are all primes of the form n!! + (n+1)!! Corresponding values of n are 0, 1, 2, 3, 4. At n>4, n!! + (n+1)!! is always composite, cf. A118333.

CROSSREFS

Cf. A118333.

Sequence in context: A117221 A073879 A073880 * A118333 A131101 A188534

Adjacent sequences:  A118329 A118330 A118331 * A118333 A118334 A118335

KEYWORD

fini,full,nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Apr 23 2006

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Last modified February 14 06:58 EST 2012. Contains 205577 sequences.