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Search: id:A039687
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A039687 Primes of form 6*2^n+1. +0
3
7, 13, 97, 193, 769, 12289, 786433, 3221225473, 206158430209, 6597069766657, 221360928884514619393, 2353913150770005286438421033702874906038383291674012942337 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Sequence in context: A110455 A132373 A110293 this_sequence A001544 A136720 A035030

Adjacent sequences: A039684 A039685 A039686 this_sequence A039688 A039689 A039690

KEYWORD

nonn

AUTHOR

Felice Russo (felice.russo(AT)katamail.com)

EXTENSIONS

For more terms see A002253.

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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