OFFSET
1,2
COMMENTS
a(n) is the rightmost nonzero digit in the base 8 expansion of n.
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
a(11) = (11/8 mod 8) = 3.
MATHEMATICA
Table[Mod[n/8^IntegerExponent[n, 8], 8], {n, 1, 160}]
m8[n_]:=Module[{idn=IntegerDigits[n, 8]}, While[idn[[-1]]==0, idn = Most[ idn]]; idn[[-1]]]; Array[m8, 90] (* Harvey P. Dale, Apr 02 2017 *)
PROG
(PARI) a(n) = n/8^valuation(n, 8) % 8; \\ Michel Marcus, Oct 20 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 19 2016
STATUS
approved