A137757 - cp's OEIS frontend

A137757 Nontrivial elements in writing the denominator of an element first and then the numerator of that element (left to right) of Leibniz's harmonic-like triangle. That is, the nontrivial elements of A137753.

n	a(n)
1	2
2	2
3	3
4	6
5	5
6	3
7	4
8	12
9	7
10	12
11	7
12	4
13	5
14	20
15	9
16	30
17	31
18	20
19	9
20	5
21	6
22	30
23	11
24	60
25	49
26	60
27	49
28	30
29	11
30	6
31	7
32	42
33	13
34	105
35	71
36	140
37	209
38	105
39	71
40	42
41	13
42	7
43	8
44	56
45	15
46	168
47	97
48	280
49	351
50	280
51	351
52	168
53	97
54	56
55	15
56	8
57	9
58	72
59	17
60	252
61	127
62	504
63	545
64	630
65	1471

[2, 2, 3, 6, 5, 3, 4, 12, 7, 12, 7, 4, 5, 20, 9, 30, 31, 20, 9, 5, 6, 30, 11, 60, 49, 60, 49, 30, 11, 6, 7, 42, 13, 105, 71, 140, 209, 105, 71, 42, 13, 7, 8, 56, 15, 168, 97, 280, 351, 280, 351, 168, 97, 56, 15, 8, 9, 72, 17, 252, 127, 504, 545, 630, 1471]

cp's OEIS Frontend

A137757 Nontrivial elements in writing the denominator of an element first and then the numerator of that element (left to right) of Leibniz's harmonic-like triangle. That is, the nontrivial elements of A137753.

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List of values