A375814 - cp's OEIS frontend

A375814 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	2
2	2
3	2
4	3
5	3
6	4
7	4
8	4
9	5
10	5
11	5
12	6
13	6
14	6
15	7
16	6
17	7
18	8
19	7
20	8
21	8
22	7
23	9
24	8
25	9
26	9
27	8
28	10
29	9
30	9
31	10
32	10
33	10
34	10
35	10
36	10
37	11
38	10
39	11
40	11
41	11
42	12
43	11
44	11
45	13
46	11
47	12
48	12
49	12
50	13
51	12
52	12
53	14
54	12
55	13
56	14
57	12
58	14
59	14
60	13
61	14
62	13
63	14
64	15
65	13
66	15
67	15
68	13
69	16
70	14
71	14
72	16

[2, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 6, 7, 8, 7, 8, 8, 7, 9, 8, 9, 9, 8, 10, 9, 9, 10, 10, 10, 10, 10, 10, 11, 10, 11, 11, 11, 12, 11, 11, 13, 11, 12, 12, 12, 13, 12, 12, 14, 12, 13, 14, 12, 14, 14, 13, 14, 13, 14, 15, 13, 15, 15, 13, 16, 14, 14, 16]

cp's OEIS Frontend

A375814 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	2
2	2
3	2
4	3
5	3
6	4
7	4
8	4
9	5
10	5
11	5
12	6
13	6
14	6
15	7
16	6
17	7
18	8
19	7
20	8
21	8
22	7
23	9
24	8
25	9
26	9
27	8
28	10
29	9
30	9
31	10
32	10
33	10
34	10
35	10
36	10
37	11
38	10
39	11
40	11
41	11
42	12
43	11
44	11
45	13
46	11
47	12
48	12
49	12
50	13
51	12
52	12
53	14
54	12
55	13
56	14
57	12
58	14
59	14
60	13
61	14
62	13
63	14
64	15
65	13
66	15
67	15
68	13
69	16
70	14
71	14
72	16

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

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