A104640 Number of odd digits in n^3.

1, 0, 1, 0, 2, 1, 2, 2, 2, 1, 4, 2, 3, 1, 4, 1, 3, 2, 2, 0, 2, 1, 3, 2, 3, 4, 3, 3, 2, 1, 4, 2, 5, 3, 2, 1, 3, 2, 5, 0, 2, 1, 4, 2, 4, 4, 3, 4, 4, 2, 4, 1, 3, 3, 4, 4, 5, 5, 4, 1, 2, 2, 2, 1, 2, 2, 3, 3, 3, 2, 6, 3, 4, 1, 3, 3, 4, 3, 4, 2, 4, 4, 5, 3, 3, 2, 3, 2, 3, 2, 6, 2, 3, 2, 5, 2, 4, 4, 4, 1

Offset

1,5

Links

G. C. Greubel, Table of n, a(n) for n = 1..10000

Formula

a(n) = A196564(n^3). - Michel Marcus, Oct 05 2013

Mathematica

Table[Count[IntegerDigits[n^3], _?OddQ], {n, 100}] (* Harvey P. Dale, Jun 23 2017 *)

Prog

(PARI) a(n) = my(d = digits(n^3)); sum(i=1, #d, d[i] % 2); \\ Michel Marcus, Oct 05 2013

Crossrefs

Cf. A104639, A196564.

Sequence in context: A336158 A335283 A126865 * A193335 A016727 A335420

Adjacent sequences: A104637 A104638 A104639 * A104641 A104642 A104643

Keyword

easy,nonn,base

Author

Zak Seidov, Mar 18 2005

Status

approved