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A008557
Repeatedly convert from decimal to octal.
2
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
OFFSET
1,1
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..75
FORMULA
a(n+1) = A007094(a(n)), a(1) = 8. - Reinhard Zumkeller, Aug 29 2013
MATHEMATICA
NestList[ FromDigits[ IntegerDigits[ #, 8 ]] &, 8, 35 ]
PROG
(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
CROSSREFS
Sequence in context: A262159 A020744 A356657 * A161425 A096171 A337252
KEYWORD
nonn,base,nice,easy
AUTHOR
sbv(AT)VNET.IBM.COM (Scott Vetter), msvetter(AT)eng.xyplex.com (Mark Vetter)
STATUS
approved