A375815 - cp's OEIS frontend

A375815 Lexicographically earliest sequence of positive integers such that for any n > 0, Sum_{k = 1..n} 1/(a(k)*a(n+1-k)) <= 1.

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

[1, 2, 3, 3, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 13, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 14, 15, 15, 15]

cp's OEIS Frontend

A375815 Lexicographically earliest sequence of positive integers such that for any n > 0, Sum_{k = 1..n} 1/(a(k)*a(n+1-k)) <= 1.

Table of values

List of values

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

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

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