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A092523 Number of distinct prime factors of n-th odd number. 3
0, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 1, 2, 2, 1, 2, 2, 2, 1, 2, 1, 1, 3, 1, 1, 2, 1, 2, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 2, 2, 1, 3, 1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 2, 2, 1, 1, 3, 1, 1, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

a(n) = A001221(2*n-1).

LINKS

Table of n, a(n) for n=1..102.

Eric Weisstein's World of Mathematics, Odd Number

Eric Weisstein's World of Mathematics, Distinct Prime Factors

MATHEMATICA

Table[PrimeNu[n], {n, 1, 211, 2}] (* Harvey P. Dale, May 25 2015 *)

CROSSREFS

Cf. A091304.

Sequence in context: A030382 A192004 A120889 * A120891 A034002 A276630

Adjacent sequences:  A092520 A092521 A092522 * A092524 A092525 A092526

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Apr 07 2004

STATUS

approved

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Last modified December 3 12:51 EST 2016. Contains 278738 sequences.