A334175 Numbers that can be written as a product of two or more consecutive primorial numbers.
2, 12, 180, 360, 6300, 37800, 75600, 485100, 14553000, 69369300, 87318000, 174636000, 14567553000, 15330615300, 437026590000, 2622159540000, 4951788741900, 5244319080000, 35413721343000, 2163931680210300, 7436881482030000, 148702215919257000, 223106444460900000
Offset: 1
Keywords
Examples
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.
Links
- Amiram Eldar, Table of n, a(n) for n = 1..1318
- Eric Weisstein's World of Mathematics, Primorial.
- Index entries for sequences related to primorial numbers.