A023375 - OEIS

A023375

a(n+1) = a(n) converted to base 7 from base 4 (written in base 10).

4, 7, 10, 16, 49, 148, 742, 5938, 141808, 11802091, 4842570841, 34593916101529, 5841428292099230860, 180784187945837355598287982, 4732398970947497341225017545892387325, 1674333602909405576416684722405784994054948834029942

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OFFSET

1,1

LINKS

John Cerkan, Table of n, a(n) for n = 1..24

MATHEMATICA

NestList[FromDigits[IntegerDigits[#, 4], 7]&, 4, 20] (* Harvey P. Dale, Jul 11 2014 *)

CROSSREFS

Sequence in context: A209257 A131500 A003461 * A310714 A310715 A310716

Adjacent sequences: A023372 A023373 A023374 * A023376 A023377 A023378

KEYWORD

nonn,base

AUTHOR

David W. Wilson

EXTENSIONS

One additional term from Harvey P. Dale, Jul 11 2014

STATUS

approved