A109919 - cp's OEIS frontend

A109919 a(1) = 1, then product of consecutive composite numbers sandwiched between primes.

n	a(n)
1	1
2	2
3	1
4	3
5	4
6	5
7	6
8	7
9	720
10	11
11	12
12	13
13	3360
14	17
15	18
16	19
17	9240
18	23
19	11793600
20	29
21	30
22	31
23	45239040
24	37
25	59280
26	41
27	42
28	43
29	91080
30	47
31	311875200
32	53
33	549853920
34	59
35	60
36	61
37	1072431360
38	67
39	328440
40	71
41	72
42	73
43	2533330800
44	79
45	531360
46	83
47	4701090240
48	89

[1, 2, 1, 3, 4, 5, 6, 7, 720, 11, 12, 13, 3360, 17, 18, 19, 9240, 23, 11793600, 29, 30, 31, 45239040, 37, 59280, 41, 42, 43, 91080, 47, 311875200, 53, 549853920, 59, 60, 61, 1072431360, 67, 328440, 71, 72, 73, 2533330800, 79, 531360, 83, 4701090240, 89]

cp's OEIS Frontend

A109919 a(1) = 1, then product of consecutive composite numbers sandwiched between primes.

Table of values

List of values