id:A128200 - OEIS Search Results

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Numbers of divisors of semiprime powers: A000005(A085155(n)).

+0
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; listen)

	OFFSET	`1,2`
	COMMENT	`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: A046536 A052384 A100867 this_sequence A061988 A094151 A135800` `Adjacent sequences: A128197 A128198 A128199 this_sequence A128201 A128202 A128203`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 04 2007`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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