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A023376
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a(n+1) = a(n) converted to base 8 from base 4 (written in base 10).
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1
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4, 8, 16, 64, 512, 8192, 524288, 268435456, 4398046511104, 9223372036854775808, 19807040628566084398385987584, 2787593149816327892691964784081045188247552, 3291009114642412084309938365114701009965471731267159726697218048
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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John Cerkan, Table of n, a(n) for n = 1..19
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FORMULA
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a(n) = 2^A061418(n). - John Cerkan, Nov 04 2016
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MATHEMATICA
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NestList[FromDigits[IntegerDigits[#, 4], 8]&, 4, 15] (* Harvey P. Dale, Sep 24 2012 *)
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PROG
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(Python)
from itertools import islice
def A023376_gen(): # generator of terms
a = 2
while True:
yield 1<<a
a += a>>1
A023376_list = list(islice(A023376_gen(), 20)) # Chai Wah Wu, Sep 21 2022
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CROSSREFS
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Cf. A061418.
Sequence in context: A102358 A038238 A230112 * A242966 A337235 A038110
Adjacent sequences: A023373 A023374 A023375 * A023377 A023378 A023379
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KEYWORD
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nonn,base
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AUTHOR
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David W. Wilson
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EXTENSIONS
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One more term (a(13)) from Harvey P. Dale, Sep 24 2012
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STATUS
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approved
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