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A118366
a(1) = 1, a(n+1) = a(n)^2 + 2^(1+mu(a(n))), where mu is the Moebius function (A008683).
0
1, 5, 26, 680, 462402, 213815609606, 45717114911185399475237, 2090054595802530396148732428883232154976206173
OFFSET
1,2
CROSSREFS
Cf. A008683.
Sequence in context: A156216 A320987 A015490 * A226125 A132509 A281747
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, May 15 2006
STATUS
approved