login
A319613
a(n) = prime(n) * prime(2n).
7
6, 21, 65, 133, 319, 481, 731, 1007, 1403, 2059, 2449, 3293, 4141, 4601, 5311, 6943, 8201, 9211, 10921, 12283, 13213, 15247, 16517, 19847, 22213, 24139, 25853, 28141, 29539, 31753, 37211, 40741, 43429, 46843, 52001, 54209, 58561, 62429, 66299, 70757, 75359
OFFSET
1,1
LINKS
MAPLE
a:= n-> (p-> p(n)*p(2*n))(ithprime):
seq(a(n), n=1..50); # Alois P. Heinz, Jan 08 2019
MATHEMATICA
Table[Prime[n]*Prime[2*n], {n, 50}]
PROG
(PARI) a(n) = prime(n)*prime(2*n) \\ Felix Fröhlich, Jan 09 2019
KEYWORD
nonn
AUTHOR
Gus Wiseman, Jan 07 2019
STATUS
approved