OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..1318
Eric Weisstein's World of Mathematics, Primorial.
EXAMPLE
2 = prime(0)# * prime(1)#;
12 = prime(1)# * prime(2)#;
180 = prime(2)# * prime(3)#;
360 = prime(1)# * prime(2)# * prime(3)#;
6300 = prime(3)# * prime(4)#,
where prime(k)# is the product of the first k primes.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Apr 17 2020
STATUS
approved