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A023370
a(n+1) = a(n) converted to base 7 from base 3 (written in base 10).
1
3, 7, 15, 63, 735, 117663, 376611711, 541418425729727, 49349984138571749904574011, 1338582341211107721547432508333066741828922851, 36471417839301806650071044099094271952733028881102465703717269909932159185709375
OFFSET
1,1
COMMENTS
a(12) has 141 digits - Harvey P. Dale, May 24 2011.
LINKS
MATHEMATICA
NestList[FromDigits[IntegerDigits[#, 3], 7]&, 3, 10] (* Harvey P. Dale, May 24 2011 *)
CROSSREFS
Sequence in context: A290470 A268061 A298358 * A181071 A258936 A336100
KEYWORD
nonn,base
EXTENSIONS
a(11) from Harvey P. Dale, May 24 2011.
STATUS
approved