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A068533 a(n) = (11^(2^n)-1)/2^(n+2)/15. 1
1, 61, 446581, 47864301941221, 1099675872153778794555007944901, 1160915542845287082257685451398396234242229540362376748831753861, 2587631803429953767431812922335511171298614788064511166728057883038770884444505265048062877435638536484571643805442456022573810181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

CROSSREFS

Sequence in context: A235008 A058996 A116124 * A093631 A087513 A176272

Adjacent sequences:  A068530 A068531 A068532 * A068534 A068535 A068536

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Mar 22 2002

STATUS

approved

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Last modified April 1 05:04 EDT 2020. Contains 333155 sequences. (Running on oeis4.)