A376839 - cp's OEIS frontend

A376839 a(1) = 1. For n > 1 if A007947(a(n-1)) is in A002110, a(n) is the smallest prime not already a term. Otherwise a(n) is the least novel multiple of the smallest non divisor prime of a(n-1).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	10
11	9
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	24
24	23
25	26
26	27
27	28
28	30
29	29
30	32
31	31
32	34
33	33
34	36
35	37
36	38
37	39
38	40
39	42
40	25
41	44
42	45
43	46
44	48
45	41
46	50
47	51
48	52
49	54
50	43
51	56
52	57
53	58
54	60
55	47
56	62
57	63
58	64
59	53
60	66
61	35
62	68
63	69
64	70
65	72
66	59
67	74
68	75

[1, 2, 3, 4, 5, 6, 7, 8, 11, 10, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 23, 26, 27, 28, 30, 29, 32, 31, 34, 33, 36, 37, 38, 39, 40, 42, 25, 44, 45, 46, 48, 41, 50, 51, 52, 54, 43, 56, 57, 58, 60, 47, 62, 63, 64, 53, 66, 35, 68, 69, 70, 72, 59, 74, 75]

cp's OEIS Frontend

A376839 a(1) = 1. For n > 1 if A007947(a(n-1)) is in A002110, a(n) is the smallest prime not already a term. Otherwise a(n) is the least novel multiple of the smallest non divisor prime of a(n-1).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	10
11	9
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	24
24	23
25	26
26	27
27	28
28	30
29	29
30	32
31	31
32	34
33	33
34	36
35	37
36	38
37	39
38	40
39	42
40	25
41	44
42	45
43	46
44	48
45	41
46	50
47	51
48	52
49	54
50	43
51	56
52	57
53	58
54	60
55	47
56	62
57	63
58	64
59	53
60	66
61	35
62	68
63	69
64	70
65	72
66	59
67	74
68	75

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	10
11	9
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	24
24	23
25	26
26	27
27	28
28	30
29	29
30	32
31	31
32	34
33	33
34	36
35	37
36	38
37	39
38	40
39	42
40	25
41	44
42	45
43	46
44	48
45	41
46	50
47	51
48	52
49	54
50	43
51	56
52	57
53	58
54	60
55	47
56	62
57	63
58	64
59	53
60	66
61	35
62	68
63	69
64	70
65	72
66	59
67	74
68	75

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	10
11	9
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	24
24	23
25	26
26	27
27	28
28	30
29	29
30	32
31	31
32	34
33	33
34	36
35	37
36	38
37	39
38	40
39	42
40	25
41	44
42	45
43	46
44	48
45	41
46	50
47	51
48	52
49	54
50	43
51	56
52	57
53	58
54	60
55	47
56	62
57	63
58	64
59	53
60	66
61	35
62	68
63	69
64	70
65	72
66	59
67	74
68	75