A109915 - cp's OEIS frontend

A109915 Product of all composite numbers k such that n where prime(r-1)<=n, or 1 if this set of k is empty.

n	a(n)
1	1
2	1
3	4
4	1
5	6
6	1
7	720
8	90
9	10
10	1
11	12
12	1
13	3360
14	240
15	16
16	1
17	18
18	1
19	9240
20	462
21	22
22	1
23	11793600
24	491400
25	19656
26	756
27	28
28	1
29	30
30	1
31	45239040
32	1413720
33	42840
34	1260
35	36
36	1
37	59280
38	1560
39	40
40	1
41	42
42	1
43	91080
44	2070
45	46
46	1
47	311875200
48	6497400
49	132600
50	2652

[1, 1, 4, 1, 6, 1, 720, 90, 10, 1, 12, 1, 3360, 240, 16, 1, 18, 1, 9240, 462, 22, 1, 11793600, 491400, 19656, 756, 28, 1, 30, 1, 45239040, 1413720, 42840, 1260, 36, 1, 59280, 1560, 40, 1, 42, 1, 91080, 2070, 46, 1, 311875200, 6497400, 132600, 2652]

cp's OEIS Frontend

A109915 Product of all composite numbers k such that n where prime(r-1)<=n, or 1 if this set of k is empty.

Table of values

List of values