id:A001899 - OEIS Search Results

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Number of divisors of n of form 5k+4.

+0
2

0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 2, 0, 0, 1, 2, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 1, 1, 0, 1, 0, 2, 1, 0, 0, 2, 1, 0, 0, 1, 0, 2, 0, 2, 1, 1, 1, 1, 0, 0, 1, 2, 0, 0, 0, 2, 1, 1, 0, 3, 0, 1, 0, 2, 0, 1, 1, 1 (list; graph; listen)

	OFFSET	`0,25`
	FORMULA	`G.f.: Sum x^(5n+4)/(1-x^(5n+4)), n=0..inf.`
	CROSSREFS	`Sequence in context: A078646 A035217 A105964 this_sequence A059882 A094247 A053694` `Adjacent sequences: A001896 A001897 A001898 this_sequence A001900 A001901 A001902`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`Better definition from Michael Somos, Aug 31 2004`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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