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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(12) has 141 digits - Harvey P. Dale, May 24 2011.

LINKS

John Cerkan, Table of n, a(n) for n = 1..15

MATHEMATICA

NestList[FromDigits[IntegerDigits[#, 3], 7]&, 3, 10] (* Harvey P. Dale, May 24 2011 *)

CROSSREFS

Sequence in context: A290470 A268061 A298358 * A181071 A258936 A336100

Adjacent sequences:  A023367 A023368 A023369 * A023371 A023372 A023373

KEYWORD

nonn,base

AUTHOR

David W. Wilson

EXTENSIONS

a(11) from Harvey P. Dale, May 24 2011.

STATUS

approved

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Last modified May 13 15:38 EDT 2021. Contains 343860 sequences. (Running on oeis4.)