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A039716
a(n) = prime(n)!.
40
2, 6, 120, 5040, 39916800, 6227020800, 355687428096000, 121645100408832000, 25852016738884976640000, 8841761993739701954543616000000, 8222838654177922817725562880000000, 13763753091226345046315979581580902400000000, 33452526613163807108170062053440751665152000000000
OFFSET
1,1
COMMENTS
Subsequence of A000142.
LINKS
FORMULA
a(n) = A000142(A000040(n)).
a(n) = A177946(n)*A000142(n). - Reinhard Zumkeller, May 15 2010
Sum_{n>=1} 1/a(n) = A100124. - Amiram Eldar, Nov 13 2020
MAPLE
A039716 := proc(n)
ithprime(n)! ;
end proc:
seq(A039716(n), n=1..10) ; # R. J. Mathar, Aug 01 2014
MATHEMATICA
Table[Prime[n]!, {n, 1, 8}] (* Vladimir Joseph Stephan Orlovsky, Apr 27 2008 *)
PROG
(Sage)
BB = primes_first_n(14)
L = []
for i in range(13):
L.append(factorial(BB[i]))
L # Zerinvary Lajos, May 14 2007
(PARI) a(n)=prime(n)! \\ Charles R Greathouse IV, Feb 07 2012
(Magma) [Factorial(NthPrime(n)): n in [1..20]]; // Vincenzo Librandi, Apr 21 2014
CROSSREFS
KEYWORD
nonn,easy,nice
AUTHOR
STATUS
approved