A121406 - cp's OEIS frontend

A121406 a(1) = a(2) = 0; a(3) = 2; for n >= 4, a(n) = (prime(n-1)-2)*a(n-1), where prime(n) is the n-th prime.

n	a(n)
1	0
2	0
3	2
4	6
5	30
6	270
7	2970
8	44550
9	757350
10	15904350
11	429417450
12	12453106050
13	435858711750
14	16998489758250
15	696938080088250
16	31362213603971250
17	1599472893802533750
18	91169954946744423750
19	5379027341857921001250

[0, 0, 2, 6, 30, 270, 2970, 44550, 757350, 15904350, 429417450, 12453106050, 435858711750, 16998489758250, 696938080088250, 31362213603971250, 1599472893802533750, 91169954946744423750, 5379027341857921001250]

cp's OEIS Frontend

A121406 a(1) = a(2) = 0; a(3) = 2; for n >= 4, a(n) = (prime(n-1)-2)*a(n-1), where prime(n) is the n-th prime.

Table of values

List of values