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A051727 Denominator of n(n-1)(n-2)/720. 1
1, 1, 1, 120, 30, 12, 6, 24, 15, 10, 1, 8, 6, 60, 30, 24, 3, 3, 5, 40, 2, 12, 6, 120, 15, 6, 3, 8, 10, 20, 6, 24, 3, 15, 15, 24, 2, 4, 10, 120, 3, 6, 3, 120, 30, 4, 2, 8, 15, 15, 3, 24, 6, 60, 10, 8, 1, 6, 15, 120, 6, 12, 6, 40, 5, 1, 3, 24, 30, 60, 6, 24, 1, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

R. L. Graham, D. E. Knuth and O. Patashnik, Concrete Mathematics. Addison-Wesley, Reading, MA, 1990, p. 269.

LINKS

Table of n, a(n) for n=0..73.

CROSSREFS

Cf. A051726.

Sequence in context: A267025 A127148 A228746 * A174867 A244950 A174149

Adjacent sequences:  A051724 A051725 A051726 * A051728 A051729 A051730

KEYWORD

nonn,easy,frac

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified November 15 11:35 EST 2018. Contains 317238 sequences. (Running on oeis4.)