A377566 - cp's OEIS frontend

A377566 Lexicographically earliest infinite sequence of distinct positive integers such that if j = a(n-1) is primorial, a(n) is the smallest prime not already a term, whereas if j is not primorial a(n) is the smallest novel number > j divisible by rad(j).

n	a(n)
1	1
2	2
3	3
4	6
5	5
6	10
7	20
8	30
9	7
10	14
11	28
12	42
13	84
14	126
15	168
16	210
17	11
18	22
19	44
20	66
21	132
22	198
23	264
24	330
25	660
26	990
27	1320
28	1650
29	1980
30	2310
31	13
32	26
33	52
34	78
35	156
36	234
37	312
38	390
39	780
40	1170
41	1560
42	1950
43	2340
44	2730
45	5460
46	8190
47	10920
48	13650
49	16380
50	19110
51	21840
52	24570
53	27300
54	30030
55	17

[1, 2, 3, 6, 5, 10, 20, 30, 7, 14, 28, 42, 84, 126, 168, 210, 11, 22, 44, 66, 132, 198, 264, 330, 660, 990, 1320, 1650, 1980, 2310, 13, 26, 52, 78, 156, 234, 312, 390, 780, 1170, 1560, 1950, 2340, 2730, 5460, 8190, 10920, 13650, 16380, 19110, 21840, 24570, 27300, 30030, 17]

cp's OEIS Frontend

A377566 Lexicographically earliest infinite sequence of distinct positive integers such that if j = a(n-1) is primorial, a(n) is the smallest prime not already a term, whereas if j is not primorial a(n) is the smallest novel number > j divisible by rad(j).

Table of values

List of values