A161323 Perfect numbers written in base 8.

6, 34, 760, 17700, 177770000, 77777600000, 1777777000000, 177777777770000000000, 17777777777777777777700000000000000000000, 77777777777777777777777777777600000000000000000000000000000

Offset

1,1

Comments

All members end in 0, 1, 4, 5, or 6. Conjecturally, apart from the first two terms, all terms end in 0.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..15

Mathematica

FromDigits[IntegerDigits[#, 8]]&/@PerfectNumber[Range[10]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 08 2019 *)

Crossrefs

Cf. A000396, A135650, A160962.

Sequence in context: A230246 A092336 A262104 * A003423 A230936 A230941

Adjacent sequences: A161320 A161321 A161322 * A161324 A161325 A161326

Keyword

nonn,base

Author

Juri-Stepan Gerasimov, Jun 07 2009

Extensions

Edited by Charles R Greathouse IV, Mar 19 2010

Status

approved