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A001899 Number of divisors of n of form 5k+4. 1
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; refs; listen; history; internal format)
OFFSET

0,25

FORMULA

G.f.: Sum x^(5n+4)/(1-x^(5n+4)), n=0..inf.

CROSSREFS

Sequence in context: A078646 A035217 A105964 * A059882 A094247 A053694

Adjacent sequences:  A001896 A001897 A001898 * 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 February 17 14:50 EST 2012. Contains 206050 sequences.