A051726 Numerator of n*(n-1)*(n-2)/720.

0, 0, 0, 1, 1, 1, 1, 7, 7, 7, 1, 11, 11, 143, 91, 91, 14, 17, 34, 323, 19, 133, 77, 1771, 253, 115, 65, 195, 273, 609, 203, 899, 124, 682, 748, 1309, 119, 259, 703, 9139, 247, 533, 287, 12341, 3311, 473, 253, 1081, 2162, 2303, 490, 4165, 1105, 11713

Offset

0,8

References

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

Links

Enrique Pérez Herrero, Table of n, a(n) for n = 0..2000

Prog

(PARI) A051726(n)=numerator(n*(n-1)*(n-2)/720); \\ Enrique Pérez Herrero, Jan 12 2023

Crossrefs

Cf. A051727 (denominator).

Sequence in context: A131685 A019860 A011422 * A139824 A019799 A341908

Adjacent sequences: A051723 A051724 A051725 * A051727 A051728 A051729

Keyword

nonn,easy,frac

Author

N. J. A. Sloane

Status

approved