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A023380
a(n+1) = a(n) converted to base 7 from base 5 (written in base 10).
1
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
MATHEMATICA
NestList[FromDigits[IntegerDigits[#, 5], 7]&, 5, 30] (* Harvey P. Dale, Aug 13 2014 *)
CROSSREFS
Sequence in context: A080384 A086398 A356052 * A076190 A028885 A228233
KEYWORD
nonn
STATUS
approved