A359857 - cp's OEIS frontend

A359857 a(1) = 1, a(2) = 2, and let i,j represent a(n-2), a(n-1) respectively. For n > 2: If only one of i,j is prime, a(n) = least novel multiple of i+j. If i,j are both prime, a(n) = least novel multiple of i*j. If both i,j are nonprime, a(n) is least novel k prime to both i and j.

n	a(n)
1	1
2	2
3	3
4	6
5	9
6	5
7	14
8	19
9	33
10	52
11	7
12	59
13	413
14	472
15	11
16	483
17	494
18	17
19	511
20	528
21	13
22	541
23	7033
24	7574
25	15
26	23
27	38
28	61
29	99
30	160
31	29
32	189
33	218
34	25
35	21
36	4
37	31
38	35
39	66
40	37
41	103
42	3811
43	3914
44	27
45	41
46	68
47	109
48	177
49	286
50	43
51	329
52	372
53	53
54	425
55	478
56	39
57	47
58	86
59	133
60	45
61	8

[1, 2, 3, 6, 9, 5, 14, 19, 33, 52, 7, 59, 413, 472, 11, 483, 494, 17, 511, 528, 13, 541, 7033, 7574, 15, 23, 38, 61, 99, 160, 29, 189, 218, 25, 21, 4, 31, 35, 66, 37, 103, 3811, 3914, 27, 41, 68, 109, 177, 286, 43, 329, 372, 53, 425, 478, 39, 47, 86, 133, 45, 8]

cp's OEIS Frontend

A359857 a(1) = 1, a(2) = 2, and let i,j represent a(n-2), a(n-1) respectively. For n > 2: If only one of i,j is prime, a(n) = least novel multiple of i+j. If i,j are both prime, a(n) = least novel multiple of i*j. If both i,j are nonprime, a(n) is least novel k prime to both i and j.

Table of values

List of values