A251559 - cp's OEIS frontend

A251559 a(n) = 2 more than the largest odd number among {A098550(1), A098550(2), ..., A098550(n)} which is neither a prime nor a term of A251542.

n	a(n)
1	9
2	9
3	9
4	9
5	15
6	15
7	21
8	21
9	21
10	21
11	21
12	21
13	39
14	39
15	39
16	39
17	39
18	39
19	39
20	39
21	45
22	45
23	45
24	45
25	45
26	49
27	49
28	55
29	55
30	55
31	55
32	55
33	55
34	57
35	57
36	69
37	69
38	93
39	93
40	93
41	93
42	93
43	93
44	93
45	93
46	93
47	93
48	93
49	93
50	93
51	93
52	93
53	93
54	93
55	93
56	93
57	93
58	93
59	93
60	93
61	93
62	93
63	93
64	99
65	99
66	105
67	105
68	105
69	105
70	121

[9, 9, 9, 9, 15, 15, 21, 21, 21, 21, 21, 21, 39, 39, 39, 39, 39, 39, 39, 39, 45, 45, 45, 45, 45, 49, 49, 55, 55, 55, 55, 55, 55, 57, 57, 69, 69, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 99, 99, 105, 105, 105, 105, 121]

cp's OEIS Frontend

A251559 a(n) = 2 more than the largest odd number among {A098550(1), A098550(2), ..., A098550(n)} which is neither a prime nor a term of A251542.

Table of values

List of values

n	a(n)
1	9
2	9
3	9
4	9
5	15
6	15
7	21
8	21
9	21
10	21
11	21
12	21
13	39
14	39
15	39
16	39
17	39
18	39
19	39
20	39
21	45
22	45
23	45
24	45
25	45
26	49
27	49
28	55
29	55
30	55
31	55
32	55
33	55
34	57
35	57
36	69
37	69
38	93
39	93
40	93
41	93
42	93
43	93
44	93
45	93
46	93
47	93
48	93
49	93
50	93
51	93
52	93
53	93
54	93
55	93
56	93
57	93
58	93
59	93
60	93
61	93
62	93
63	93
64	99
65	99
66	105
67	105
68	105
69	105
70	121

n	a(n)
1	9
2	9
3	9
4	9
5	15
6	15
7	21
8	21
9	21
10	21
11	21
12	21
13	39
14	39
15	39
16	39
17	39
18	39
19	39
20	39
21	45
22	45
23	45
24	45
25	45
26	49
27	49
28	55
29	55
30	55
31	55
32	55
33	55
34	57
35	57
36	69
37	69
38	93
39	93
40	93
41	93
42	93
43	93
44	93
45	93
46	93
47	93
48	93
49	93
50	93
51	93
52	93
53	93
54	93
55	93
56	93
57	93
58	93
59	93
60	93
61	93
62	93
63	93
64	99
65	99
66	105
67	105
68	105
69	105
70	121

n	a(n)
1	9
2	9
3	9
4	9
5	15
6	15
7	21
8	21
9	21
10	21
11	21
12	21
13	39
14	39
15	39
16	39
17	39
18	39
19	39
20	39
21	45
22	45
23	45
24	45
25	45
26	49
27	49
28	55
29	55
30	55
31	55
32	55
33	55
34	57
35	57
36	69
37	69
38	93
39	93
40	93
41	93
42	93
43	93
44	93
45	93
46	93
47	93
48	93
49	93
50	93
51	93
52	93
53	93
54	93
55	93
56	93
57	93
58	93
59	93
60	93
61	93
62	93
63	93
64	99
65	99
66	105
67	105
68	105
69	105
70	121