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A023376
a(n+1) = a(n) converted to base 8 from base 4 (written in base 10).
1
4, 8, 16, 64, 512, 8192, 524288, 268435456, 4398046511104, 9223372036854775808, 19807040628566084398385987584, 2787593149816327892691964784081045188247552, 3291009114642412084309938365114701009965471731267159726697218048
OFFSET
1,1
LINKS
FORMULA
a(n) = 2^A061418(n). - John Cerkan, Nov 04 2016
MATHEMATICA
NestList[FromDigits[IntegerDigits[#, 4], 8]&, 4, 15] (* Harvey P. Dale, Sep 24 2012 *)
PROG
(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
CROSSREFS
Cf. A061418.
Sequence in context: A102358 A038238 A230112 * A242966 A337235 A038110
KEYWORD
nonn,base
EXTENSIONS
One more term (a(13)) from Harvey P. Dale, Sep 24 2012
STATUS
approved