A109400 - cp's OEIS frontend

A109400 For all k: the first k numbers followed by the first k primes.

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	3
7	1
8	2
9	3
10	2
11	3
12	5
13	1
14	2
15	3
16	4
17	2
18	3
19	5
20	7
21	1
22	2
23	3
24	4
25	5
26	2
27	3
28	5
29	7
30	11
31	1
32	2
33	3
34	4
35	5
36	6
37	2
38	3
39	5
40	7
41	11
42	13
43	1
44	2
45	3
46	4
47	5
48	6
49	7
50	2
51	3
52	5
53	7
54	11
55	13
56	17
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	8
65	2
66	3
67	5
68	7
69	11
70	13
71	17
72	19
73	1
74	2
75	3
76	4
77	5
78	6
79	7
80	8
81	9
82	2
83	3
84	5
85	7
86	11
87	13
88	17
89	19
90	23

[1, 2, 1, 2, 2, 3, 1, 2, 3, 2, 3, 5, 1, 2, 3, 4, 2, 3, 5, 7, 1, 2, 3, 4, 5, 2, 3, 5, 7, 11, 1, 2, 3, 4, 5, 6, 2, 3, 5, 7, 11, 13, 1, 2, 3, 4, 5, 6, 7, 2, 3, 5, 7, 11, 13, 17, 1, 2, 3, 4, 5, 6, 7, 8, 2, 3, 5, 7, 11, 13, 17, 19, 1, 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 5, 7, 11, 13, 17, 19, 23]

cp's OEIS Frontend

A109400 For all k: the first k numbers followed by the first k primes.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	3
7	1
8	2
9	3
10	2
11	3
12	5
13	1
14	2
15	3
16	4
17	2
18	3
19	5
20	7
21	1
22	2
23	3
24	4
25	5
26	2
27	3
28	5
29	7
30	11
31	1
32	2
33	3
34	4
35	5
36	6
37	2
38	3
39	5
40	7
41	11
42	13
43	1
44	2
45	3
46	4
47	5
48	6
49	7
50	2
51	3
52	5
53	7
54	11
55	13
56	17
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	8
65	2
66	3
67	5
68	7
69	11
70	13
71	17
72	19
73	1
74	2
75	3
76	4
77	5
78	6
79	7
80	8
81	9
82	2
83	3
84	5
85	7
86	11
87	13
88	17
89	19
90	23

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	3
7	1
8	2
9	3
10	2
11	3
12	5
13	1
14	2
15	3
16	4
17	2
18	3
19	5
20	7
21	1
22	2
23	3
24	4
25	5
26	2
27	3
28	5
29	7
30	11
31	1
32	2
33	3
34	4
35	5
36	6
37	2
38	3
39	5
40	7
41	11
42	13
43	1
44	2
45	3
46	4
47	5
48	6
49	7
50	2
51	3
52	5
53	7
54	11
55	13
56	17
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	8
65	2
66	3
67	5
68	7
69	11
70	13
71	17
72	19
73	1
74	2
75	3
76	4
77	5
78	6
79	7
80	8
81	9
82	2
83	3
84	5
85	7
86	11
87	13
88	17
89	19
90	23

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	3
7	1
8	2
9	3
10	2
11	3
12	5
13	1
14	2
15	3
16	4
17	2
18	3
19	5
20	7
21	1
22	2
23	3
24	4
25	5
26	2
27	3
28	5
29	7
30	11
31	1
32	2
33	3
34	4
35	5
36	6
37	2
38	3
39	5
40	7
41	11
42	13
43	1
44	2
45	3
46	4
47	5
48	6
49	7
50	2
51	3
52	5
53	7
54	11
55	13
56	17
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	8
65	2
66	3
67	5
68	7
69	11
70	13
71	17
72	19
73	1
74	2
75	3
76	4
77	5
78	6
79	7
80	8
81	9
82	2
83	3
84	5
85	7
86	11
87	13
88	17
89	19
90	23