A023380 a(n+1) = a(n) converted to base 7 from base 5 (written in base 10).

5, 7, 9, 11, 15, 21, 29, 53, 101, 197, 471, 1205, 3927, 19651, 137593, 1243889, 17815781, 446377513, 21886017793, 2290044969551, 697988552388639, 733856563397342627, 3102723977467356326765, 72303720506476062470266309

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..40

Mathematica

NestList[FromDigits[IntegerDigits[#, 5], 7]&, 5, 30] (* Harvey P. Dale, Aug 13 2014 *)

Crossrefs

Sequence in context: A080384 A086398 A356052 * A076190 A028885 A228233

Adjacent sequences: A023377 A023378 A023379 * A023381 A023382 A023383

Keyword

nonn

Author

David W. Wilson

Status

approved