A161514 Number of digits in n-th even perfect number written in base 8.

1, 2, 3, 5, 9, 11, 13, 21, 41, 59, 71, 85, 347, 405, 853, 1469, 1521, 2145, 2835, 2949, 6459, 6627, 7475, 13291, 14467, 15473, 29665, 57495, 73669, 88033, 144061, 504559, 572955, 838525, 932179, 1984147, 2014251, 4648395, 8977945, 13997341, 16024389, 17309967, 20268305, 21721771, 24771111, 28429201, 28741739

Offset

1,2

Comments

Or number of digits in A161323(n), assuming that all perfect numbers are even.

Links

Ivan Panchenko, Table of n, a(n) for n = 1..47

Crossrefs

Cf. A000396, A161323.

Sequence in context: A067139 A014657 A171056 * A215779 A140329 A163292

Adjacent sequences: A161511 A161512 A161513 * A161515 A161516 A161517

Keyword

nonn,base

Author

Juri-Stepan Gerasimov, Jun 12 2009

Extensions

Definition changed (inserting the word "even"), a(12) and a(27) corrected and a(40)-a(45) added by Ivan Panchenko, Aug 06 2018

Status

approved