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A277546
a(n) = n/8^m mod 8, where 8^m is the greatest power of 8 that divides n.
1
1, 2, 3, 4, 5, 6, 7, 1, 1, 2, 3, 4, 5, 6, 7, 2, 1, 2, 3, 4, 5, 6, 7, 3, 1, 2, 3, 4, 5, 6, 7, 4, 1, 2, 3, 4, 5, 6, 7, 5, 1, 2, 3, 4, 5, 6, 7, 6, 1, 2, 3, 4, 5, 6, 7, 7, 1, 2, 3, 4, 5, 6, 7, 1, 1, 2, 3, 4, 5, 6, 7, 1, 1, 2, 3, 4, 5, 6, 7, 2, 1, 2, 3, 4, 5, 6
OFFSET
1,2
COMMENTS
a(n) is the rightmost nonzero digit in the base 8 expansion of n.
LINKS
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
Cf. A010877.
Sequence in context: A054634 A346731 A255828 * A190597 A338881 A053843
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 19 2016
STATUS
approved