A001525 - OEIS

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A001525

a(n) = (3n)!/(3!n!).
(Formerly M5320)

1, 60, 10080, 3326400, 1816214400, 1482030950400, 1689515283456000, 2564684200286208000, 5001134190558105600000, 12182762888199545241600000, 36255902355281846639001600000, 129433571408356192501235712000000, 545950804200446419970212233216000000

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

T. D. Noe, Table of n, a(n) for n = 1..100

MATHEMATICA

Table[(3 n)!/(3! n!), {n, 20}] (* Harvey P. Dale, May 25 2011 *)

CROSSREFS

Equals A064350/3!, row sums of A157704/3! and row sums of A157705/3!.

Sequence in context: A295815 A146498 A003750 * A377667 A309996 A146513