A068533 a(n) = (11^(2^n)-1)/2^(n+2)/15.

1, 61, 446581, 47864301941221, 1099675872153778794555007944901, 1160915542845287082257685451398396234242229540362376748831753861, 2587631803429953767431812922335511171298614788064511166728057883038770884444505265048062877435638536484571643805442456022573810181

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