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A195390
a(n) = (6*n)!
6
1, 720, 479001600, 6402373705728000, 620448401733239439360000, 265252859812191058636308480000000, 371993326789901217467999448150835200000000, 1405006117752879898543142606244511569936384000000000, 12413915592536072670862289047373375038521486354677760000000000
OFFSET
0,2
LINKS
FORMULA
From Amiram Eldar, Apr 03 2021: (Start)
a(n) = A000142(A008588(n)).
Sum_{n>=0} 1/a(n) = A332892. (End)
MATHEMATICA
(6*Range[0, 10])! (* Harvey P. Dale, Dec 16 2013 *)
PROG
(Magma) [Factorial(6*n): n in [0..10]]
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Sep 24 2011
STATUS
approved