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A008557 Repeatedly convert from decimal to octal. 2

%I

%S 8,10,12,14,16,20,24,30,36,44,54,66,102,146,222,336,520,1010,1762,

%T 3342,6416,14420,34124,102514,310162,1135622,4252006,20160546,

%U 114720042,665476452,4752456544,43321135540,502611010664,7240574662150,151272370273006

%N Repeatedly convert from decimal to octal.

%H Reinhard Zumkeller, <a href="/A008557/b008557.txt">Table of n, a(n) for n = 1..75</a>

%F a(n+1) = A007094(a(n)), a(1) = 8. - _Reinhard Zumkeller_, Aug 29 2013

%t NestList[ FromDigits[ IntegerDigits[ #, 8 ]] &, 8, 35 ]

%o (Haskell)

%o a008557 n = a008557_list !! (n-1)

%o a008557_list = iterate a007094 8 -- _Reinhard Zumkeller_, Aug 29 2013

%o (Python)

%o def aupton(terms):

%o alst = [8]

%o for n in range(2, terms+1): alst.append(int(oct(alst[-1])[2:]))

%o return alst

%o print(aupton(35)) # _Michael S. Branicky_, Aug 10 2021

%Y Cf. A007094, A008558.

%K nonn,base,nice,easy

%O 1,1

%A sbv(AT)VNET.IBM.COM (Scott Vetter), msvetter(AT)eng.xyplex.com (Mark Vetter)

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Last modified August 9 15:33 EDT 2022. Contains 356026 sequences. (Running on oeis4.)