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A068532 a(n)=(5^(2^n)-1)/2^(n+2)/3. 0
1, 13, 4069, 794728597, 60632980118195215861, 705860789378583615890268750566368301709493, 191323950329148357416786545771849882457465097130873620037231723027086142489376167456309 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A134159 A070905 A180768 * A094316 A174310 A057842

Adjacent sequences:  A068529 A068530 A068531 * A068533 A068534 A068535

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 22 2002

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Last modified February 15 21:45 EST 2012. Contains 205860 sequences.