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A029807 1/(8n) * sum over d|n of {mu(n/d) * (2d choose d)^3}. 0
1, 13, 333, 10712, 400075, 16435017, 721861385, 33308540000, 1596292110000, 78832566399375, 3989172320345245, 205979496842877048, 10817872108002076923, 576440295110730997877, 31102930647624990624975 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A012492 A183440 A142543 * A097308 A204195 A041315

Adjacent sequences:  A029804 A029805 A029806 * A029808 A029809 A029810

KEYWORD

nonn

AUTHOR

Lionel Levine (levine(AT)ultranet.com)

EXTENSIONS

More terms from Erich Friedman (erich.friedman(AT)stetson.edu).

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.