A357378 - cp's OEIS frontend

A357378 Lexicographically earliest sequence of positive integers such that the values a(floor(n/2)) * a(n) are all distinct.

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	5
6	1
7	3
8	3
9	4
10	1
11	3
12	7
13	11
14	6
15	7
16	8
17	9
18	5
19	7
20	13
21	14
22	10
23	11
24	5
25	6
26	2
27	4
28	6
29	8
30	7
31	8
32	4
33	5
34	5
35	6
36	5
37	10
38	9
39	10
40	2
41	3
42	6
43	7
44	6
45	8
46	5
47	6
48	13
49	15
50	12
51	13
52	17
53	19
54	13
55	16
56	15
57	16
58	11
59	13
60	11
61	13
62	14
63	15
64	17
65	19
66	17
67	19
68	20
69	21
70	17
71	18
72	22
73	23
74	13

[1, 2, 2, 3, 4, 5, 1, 3, 3, 4, 1, 3, 7, 11, 6, 7, 8, 9, 5, 7, 13, 14, 10, 11, 5, 6, 2, 4, 6, 8, 7, 8, 4, 5, 5, 6, 5, 10, 9, 10, 2, 3, 6, 7, 6, 8, 5, 6, 13, 15, 12, 13, 17, 19, 13, 16, 15, 16, 11, 13, 11, 13, 14, 15, 17, 19, 17, 19, 20, 21, 17, 18, 22, 23, 13]

cp's OEIS Frontend

A357378 Lexicographically earliest sequence of positive integers such that the values a(floor(n/2)) * a(n) are all distinct.

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	5
6	1
7	3
8	3
9	4
10	1
11	3
12	7
13	11
14	6
15	7
16	8
17	9
18	5
19	7
20	13
21	14
22	10
23	11
24	5
25	6
26	2
27	4
28	6
29	8
30	7
31	8
32	4
33	5
34	5
35	6
36	5
37	10
38	9
39	10
40	2
41	3
42	6
43	7
44	6
45	8
46	5
47	6
48	13
49	15
50	12
51	13
52	17
53	19
54	13
55	16
56	15
57	16
58	11
59	13
60	11
61	13
62	14
63	15
64	17
65	19
66	17
67	19
68	20
69	21
70	17
71	18
72	22
73	23
74	13

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	5
6	1
7	3
8	3
9	4
10	1
11	3
12	7
13	11
14	6
15	7
16	8
17	9
18	5
19	7
20	13
21	14
22	10
23	11
24	5
25	6
26	2
27	4
28	6
29	8
30	7
31	8
32	4
33	5
34	5
35	6
36	5
37	10
38	9
39	10
40	2
41	3
42	6
43	7
44	6
45	8
46	5
47	6
48	13
49	15
50	12
51	13
52	17
53	19
54	13
55	16
56	15
57	16
58	11
59	13
60	11
61	13
62	14
63	15
64	17
65	19
66	17
67	19
68	20
69	21
70	17
71	18
72	22
73	23
74	13

n	a(n)
0	1
1	2
2	2
3	3
4	4
5	5
6	1
7	3
8	3
9	4
10	1
11	3
12	7
13	11
14	6
15	7
16	8
17	9
18	5
19	7
20	13
21	14
22	10
23	11
24	5
25	6
26	2
27	4
28	6
29	8
30	7
31	8
32	4
33	5
34	5
35	6
36	5
37	10
38	9
39	10
40	2
41	3
42	6
43	7
44	6
45	8
46	5
47	6
48	13
49	15
50	12
51	13
52	17
53	19
54	13
55	16
56	15
57	16
58	11
59	13
60	11
61	13
62	14
63	15
64	17
65	19
66	17
67	19
68	20
69	21
70	17
71	18
72	22
73	23
74	13