A084400 - cp's OEIS frontend

A084400 a(1) = 1; for n>1, a(n) = smallest number that does not divide the product of all previous terms.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	9
8	11
9	13
10	16
11	17
12	19
13	23
14	25
15	29
16	31
17	37
18	41
19	43
20	47
21	49
22	53
23	59
24	61
25	67
26	71
27	73
28	79
29	81
30	83
31	89
32	97
33	101
34	103
35	107
36	109
37	113
38	121
39	127
40	131
41	137
42	139
43	149
44	151
45	157
46	163
47	167
48	169
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239

[1, 2, 3, 4, 5, 7, 9, 11, 13, 16, 17, 19, 23, 25, 29, 31, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 81, 83, 89, 97, 101, 103, 107, 109, 113, 121, 127, 131, 137, 139, 149, 151, 157, 163, 167, 169, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239]

cp's OEIS Frontend

A084400 a(1) = 1; for n>1, a(n) = smallest number that does not divide the product of all previous terms.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	9
8	11
9	13
10	16
11	17
12	19
13	23
14	25
15	29
16	31
17	37
18	41
19	43
20	47
21	49
22	53
23	59
24	61
25	67
26	71
27	73
28	79
29	81
30	83
31	89
32	97
33	101
34	103
35	107
36	109
37	113
38	121
39	127
40	131
41	137
42	139
43	149
44	151
45	157
46	163
47	167
48	169
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	9
8	11
9	13
10	16
11	17
12	19
13	23
14	25
15	29
16	31
17	37
18	41
19	43
20	47
21	49
22	53
23	59
24	61
25	67
26	71
27	73
28	79
29	81
30	83
31	89
32	97
33	101
34	103
35	107
36	109
37	113
38	121
39	127
40	131
41	137
42	139
43	149
44	151
45	157
46	163
47	167
48	169
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	9
8	11
9	13
10	16
11	17
12	19
13	23
14	25
15	29
16	31
17	37
18	41
19	43
20	47
21	49
22	53
23	59
24	61
25	67
26	71
27	73
28	79
29	81
30	83
31	89
32	97
33	101
34	103
35	107
36	109
37	113
38	121
39	127
40	131
41	137
42	139
43	149
44	151
45	157
46	163
47	167
48	169
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239