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A109218 Numbers n such that A109217(n) is prime. 1
3, 20, 24, 30, 42, 78, 84, 98, 608, 698, 728, 746 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

a(2)=20 because A109217(20) = 1101111011111101111111 is prime.

CROSSREFS

Cf. A000037, A109217.

Sequence in context: A081849 A169642 A022129 * A053748 A075358 A002461

Adjacent sequences:  A109215 A109216 A109217 * A109219 A109220 A109221

KEYWORD

more,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jun 22 2005

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.