A280740 - cp's OEIS frontend

A280740 After S(n)=A280864(n) has been computed, let p(n) = product of distinct primes shared by S(n-1) and S(n); let q(n) = product of distinct primes in S(n) but not in S(n-1); and let r(n) = smallest number not yet in S. Sequence gives r(n).

n	a(n)
1	2
2	3
3	3
4	5
5	5
6	5
7	7
8	7
9	7
10	7
11	11
12	11
13	11
14	13
15	13
16	13
17	13
18	13
19	13
20	13
21	13
22	13
23	17
24	19
25	19
26	19
27	19
28	23
29	23
30	23
31	25
32	25
33	25
34	25
35	29
36	29
37	29
38	29
39	31
40	31
41	31
42	31
43	31
44	31
45	31
46	31
47	31
48	31
49	37
50	37
51	37
52	37
53	37
54	37
55	41
56	41
57	41
58	41
59	41
60	41
61	41
62	41
63	43
64	43
65	43
66	47
67	47
68	47
69	47
70	53
71	53
72	53
73	53
74	53
75	53
76	53
77	53
78	53
79	53

[2, 3, 3, 5, 5, 5, 7, 7, 7, 7, 11, 11, 11, 13, 13, 13, 13, 13, 13, 13, 13, 13, 17, 19, 19, 19, 19, 23, 23, 23, 25, 25, 25, 25, 29, 29, 29, 29, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 37, 37, 37, 37, 37, 37, 41, 41, 41, 41, 41, 41, 41, 41, 43, 43, 43, 47, 47, 47, 47, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53]

cp's OEIS Frontend

A280740 After S(n)=A280864(n) has been computed, let p(n) = product of distinct primes shared by S(n-1) and S(n); let q(n) = product of distinct primes in S(n) but not in S(n-1); and let r(n) = smallest number not yet in S. Sequence gives r(n).

Table of values

List of values

n	a(n)
1	2
2	3
3	3
4	5
5	5
6	5
7	7
8	7
9	7
10	7
11	11
12	11
13	11
14	13
15	13
16	13
17	13
18	13
19	13
20	13
21	13
22	13
23	17
24	19
25	19
26	19
27	19
28	23
29	23
30	23
31	25
32	25
33	25
34	25
35	29
36	29
37	29
38	29
39	31
40	31
41	31
42	31
43	31
44	31
45	31
46	31
47	31
48	31
49	37
50	37
51	37
52	37
53	37
54	37
55	41
56	41
57	41
58	41
59	41
60	41
61	41
62	41
63	43
64	43
65	43
66	47
67	47
68	47
69	47
70	53
71	53
72	53
73	53
74	53
75	53
76	53
77	53
78	53
79	53

n	a(n)
1	2
2	3
3	3
4	5
5	5
6	5
7	7
8	7
9	7
10	7
11	11
12	11
13	11
14	13
15	13
16	13
17	13
18	13
19	13
20	13
21	13
22	13
23	17
24	19
25	19
26	19
27	19
28	23
29	23
30	23
31	25
32	25
33	25
34	25
35	29
36	29
37	29
38	29
39	31
40	31
41	31
42	31
43	31
44	31
45	31
46	31
47	31
48	31
49	37
50	37
51	37
52	37
53	37
54	37
55	41
56	41
57	41
58	41
59	41
60	41
61	41
62	41
63	43
64	43
65	43
66	47
67	47
68	47
69	47
70	53
71	53
72	53
73	53
74	53
75	53
76	53
77	53
78	53
79	53

n	a(n)
1	2
2	3
3	3
4	5
5	5
6	5
7	7
8	7
9	7
10	7
11	11
12	11
13	11
14	13
15	13
16	13
17	13
18	13
19	13
20	13
21	13
22	13
23	17
24	19
25	19
26	19
27	19
28	23
29	23
30	23
31	25
32	25
33	25
34	25
35	29
36	29
37	29
38	29
39	31
40	31
41	31
42	31
43	31
44	31
45	31
46	31
47	31
48	31
49	37
50	37
51	37
52	37
53	37
54	37
55	41
56	41
57	41
58	41
59	41
60	41
61	41
62	41
63	43
64	43
65	43
66	47
67	47
68	47
69	47
70	53
71	53
72	53
73	53
74	53
75	53
76	53
77	53
78	53
79	53