A109920 - cp's OEIS frontend

A109920 a(1) = 1, then LCM 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	360
10	11
11	12
12	13
13	1680
14	17
15	18
16	19
17	4620
18	23
19	491400
20	29
21	30
22	31
23	1884960
24	37
25	29640
26	41
27	42
28	43
29	45540
30	47
31	12994800
32	53
33	45821160
34	59
35	60
36	61
37	89369280
38	67
39	164220
40	71
41	72
42	73
43	211110900
44	79
45	265680
46	83
47	195878760
48	89

[1, 2, 1, 3, 4, 5, 6, 7, 360, 11, 12, 13, 1680, 17, 18, 19, 4620, 23, 491400, 29, 30, 31, 1884960, 37, 29640, 41, 42, 43, 45540, 47, 12994800, 53, 45821160, 59, 60, 61, 89369280, 67, 164220, 71, 72, 73, 211110900, 79, 265680, 83, 195878760, 89]

cp's OEIS Frontend

A109920 a(1) = 1, then LCM of consecutive composite numbers sandwiched between primes.

Table of values

List of values