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A105180 Numbers n such that 2^(2*n+1) + 2^n + 1 is prime. 0
1, 2, 3, 5, 9, 25, 34, 36, 42, 52, 176, 262, 269, 283, 284, 289, 372, 392, 486, 596, 999, 1022, 1097, 1105, 2329, 2663, 3037, 3363, 3853, 5167, 6305, 7164, 7283 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

2^3+2^1+1=11 prime so a(1)=1

2^5+2^2+1=37 prime so a(2)=2

2^7+2^3+1=137 prime so a(3)=3

CROSSREFS

Sequence in context: A110542 A101542 A101581 * A094206 A118998 A003432

Adjacent sequences:  A105177 A105178 A105179 * A105181 A105182 A105183

KEYWORD

more,nonn

AUTHOR

Pierre CAMI (pierre-cami(AT)bbox.fr), Apr 11 2005

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Last modified February 17 10:57 EST 2012. Contains 206009 sequences.