A004323 Binomial coefficient C(3n,n-5).

1, 18, 210, 2024, 17550, 142506, 1107568, 8347680, 61523748, 445891810, 3190187286, 22595200368, 158753389900, 1108176102180, 7694644696200, 53194089192720, 366395202809685, 2515943049305400, 17231414395464984

Offset

5,2

References

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 828.

Links

Seiichi Manyama, Table of n, a(n) for n = 5..1000

Milan Janjic, Two Enumerative Functions

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

Mathematica

Table[Binomial[3n, n - 5], {n, 5, 30}] (* Stefan Steinerberger, Apr 11 2006 *)

Prog

(Magma) [Binomial(3*n, n-5): n in [5..30]]; // Vincenzo Librandi, Aug 26 2015

Crossrefs

Sequence in context: A025959 A229270 A261484 * A025937 A021804 A025932

Adjacent sequences: A004320 A004321 A004322 * A004324 A004325 A004326

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved