

A157132


Factorial of primes divided by prime numbers' respective places in the sequence of primes.


1



2, 3, 40, 1260, 7983360, 1037836800, 50812489728000, 15205637551104000, 2872446304320552960000, 884176199373970195454361600000, 747530786743447528884142080000000
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..11.


FORMULA

a(n) = prime(n)!/n.


EXAMPLE

E.g. leading term = 2!/1 = 2, second term = 3!/2 = 3, third term = 5!/3 = 40, etc.


MATHEMATICA

Table[Prime[n]!/n, {n, 20}] (* Harvey P. Dale, May 24 2017 *)


PROG

(PARI) a(n) = prime(n)!/n; \\ Michel Marcus, Aug 19 2013


CROSSREFS

Terms of A039716 divided by sequence of natural numbers A000027
Cf. A177946. [From Reinhard Zumkeller, May 15 2010]
Sequence in context: A097170 A231797 A176366 * A262189 A077336 A242174
Adjacent sequences: A157129 A157130 A157131 * A157133 A157134 A157135


KEYWORD

easy,nonn


AUTHOR

Jeremy Cahill (jcahill(AT)inbox.com), Feb 23 2009


STATUS

approved



