A118747 - cp's OEIS frontend

A118747 a(n) = product[k=1..n] P(k), where P(k) is the largest prime <= 2*k. a(n) = product[k=1..n] A060308(k).

n	a(n)
1	2
2	6
3	30
4	210
5	1470
6	16170
7	210210
8	2732730
9	46456410
10	882671790
11	16770764010
12	385727572230
13	8871734161290
14	204049885709670
15	5917446685580430
16	183440847252993330
17	5686666264842793230
18	176286654210126590130

[2, 6, 30, 210, 1470, 16170, 210210, 2732730, 46456410, 882671790, 16770764010, 385727572230, 8871734161290, 204049885709670, 5917446685580430, 183440847252993330, 5686666264842793230, 176286654210126590130]

cp's OEIS Frontend

A118747 a(n) = product[k=1..n] P(k), where P(k) is the largest prime <= 2*k. a(n) = product[k=1..n] A060308(k).

Table of values

List of values