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A081848
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Number of numbers whose base-3/2 expansion (see A024629) has n digits.
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35
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3, 3, 3, 6, 9, 12, 18, 27, 42, 63, 93, 141, 210, 315, 474, 711, 1065, 1599, 2397, 3597, 5394, 8091, 12138, 18207, 27309, 40965, 61446, 92169, 138255, 207381, 311073, 466608, 699912, 1049868, 1574802, 2362203, 3543306, 5314959, 7972437, 11958657
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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a(1) = 3 because 0, 1 and 2 each have 1 digit.
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PROG
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(Haskell)
a081848 n = a081848_list !! (n-1)
a081848_list = 3 : tail (zipWith (-) (tail a070885_list) a070885_list)
(Python)
from itertools import islice
def A081848_gen(): # generator of terms
yield (a:=3)
while True:
yield (b:=(a+1>>1)+(a&1))
a += b
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CROSSREFS
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KEYWORD
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easy,nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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