A284725 - cp's OEIS frontend

A284725 a(n) = (1/3) * smallest multiple of 3 missing from [A280864(1), ..., A280864(n-1)].

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

[1, 1, 1, 1, 2, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 7, 7, 7, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11, 11, 11, 11, 11, 13, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 23, 23, 23, 27, 27, 27, 27, 27, 27, 27, 27]

cp's OEIS Frontend

A284725 a(n) = (1/3) * smallest multiple of 3 missing from [A280864(1), ..., A280864(n-1)].

Table of values

List of values

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

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

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