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A008557
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Repeatedly convert from decimal to octal.
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2
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8, 10, 12, 14, 16, 20, 24, 30, 36, 44, 54, 66, 102, 146, 222, 336, 520, 1010, 1762, 3342, 6416, 14420, 34124, 102514, 310162, 1135622, 4252006, 20160546, 114720042, 665476452, 4752456544, 43321135540, 502611010664, 7240574662150, 151272370273006
(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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Reinhard Zumkeller, Table of n, a(n) for n = 1..75
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FORMULA
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a(n+1) = A007094(a(n)), a(1) = 8. - Reinhard Zumkeller, Aug 29 2013
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MATHEMATICA
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NestList[ FromDigits[ IntegerDigits[ #, 8 ]] &, 8, 35 ]
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PROG
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(Haskell)
a008557 n = a008557_list !! (n-1)
a008557_list = iterate a007094 8 -- Reinhard Zumkeller, Aug 29 2013
(Python)
def aupton(terms):
alst = [8]
for n in range(2, terms+1): alst.append(int(oct(alst[-1])[2:]))
return alst
print(aupton(35)) # Michael S. Branicky, Aug 10 2021
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CROSSREFS
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Cf. A007094, A008558.
Sequence in context: A080752 A262159 A020744 * A161425 A096171 A337252
Adjacent sequences: A008554 A008555 A008556 * A008558 A008559 A008560
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KEYWORD
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nonn,base,nice,easy
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AUTHOR
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sbv(AT)VNET.IBM.COM (Scott Vetter), msvetter(AT)eng.xyplex.com (Mark Vetter)
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STATUS
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approved
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