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A099058
A bisection of A000396.
6
28, 8128, 8589869056, 2305843008139952128, 191561942608236107294793378084303638130997321548169216, 14474011154664524427946373126085988481573677491474835889066354349131199152128
OFFSET
0,1
CROSSREFS
Sequence in context: A230268 A203328 A159407 * A281128 A222018 A283891
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 15 2004
EXTENSIONS
More terms from Joshua Zucker, May 12 2006
STATUS
approved