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A161675
Mersenne primes written in base 8.
1
3, 7, 37, 177, 17777, 377777, 1777777, 17777777777, 177777777777777777777, 377777777777777777777777777777, 377777777777777777777777777777777777, 1777777777777777777777777777777777777777777
OFFSET
1,1
LINKS
FORMULA
a(n) = A007094(A000668(n)).
MATHEMATICA
Map[FromDigits[IntegerDigits[2^# - 1, 8]] &, MersennePrimeExponent[Range[12]]] (* Amiram Eldar, Oct 22 2024 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vladislav-Stepan Malakhovsky & Juri-Stepan Gerasimov, Jun 16 2009
EXTENSIONS
a(6) and a(10) corrected by R. J. Mathar, Aug 03 2009
STATUS
approved