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 A128200 Numbers of divisors of semiprime powers: A000005(A085155(n)). 4
 1, 3, 4, 3, 4, 4, 4, 5, 4, 4, 3, 4, 4, 4, 4, 9, 4, 4, 4, 3, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 5, 4, 4, 4, 4, 4, 4, 4, 4, 9, 4, 4, 4, 4, 4, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 4, 4, 4, 4, 4, 4, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 16, 4, 4, 4, 4, 9, 4, 4, 4, 4, 4, 4, 4, 9, 4, 4, 4, 4, 4, 4, 4, 3, 4, 4, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The range of this sequence is the union of squares and the odd numbers: A128201. LINKS R. Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA a(n) = (1+A001222(A085155(n))/A001221(A085155(n)))^A001221(A085155(n)). CROSSREFS Cf. A005408, A000290. Sequence in context: A276867 A100867 A220196 * A258168 A061988 A094151 Adjacent sequences:  A128197 A128198 A128199 * A128201 A128202 A128203 KEYWORD nonn AUTHOR Reinhard Zumkeller, Mar 04 2007 STATUS approved

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Last modified January 23 06:15 EST 2019. Contains 319374 sequences. (Running on oeis4.)