A137761 - cp's OEIS frontend

A137761 Distinct numbers in writing first denominator and then numerator (left to right) of Leibniz's harmonic-like triangle.

n	a(n)
1	1
2	2
3	3
4	6
5	5
6	4
7	12
8	7
9	20
10	9
11	30
12	31
13	11
14	60
15	49
16	42
17	13
18	105
19	71
20	140
21	209
22	8
23	56
24	15
25	168
26	97
27	280
28	351
29	72
30	17
31	252
32	127
33	504
34	545
35	630
36	1471
37	10
38	90
39	19
40	360
41	161
42	840
43	799
44	1260
45	2561
46	110
47	21
48	495
49	199
50	1320
51	1121
52	2310
53	4159
54	2772
55	10625

[1, 2, 3, 6, 5, 4, 12, 7, 20, 9, 30, 31, 11, 60, 49, 42, 13, 105, 71, 140, 209, 8, 56, 15, 168, 97, 280, 351, 72, 17, 252, 127, 504, 545, 630, 1471, 10, 90, 19, 360, 161, 840, 799, 1260, 2561, 110, 21, 495, 199, 1320, 1121, 2310, 4159, 2772, 10625]

cp's OEIS Frontend

A137761 Distinct numbers in writing first denominator and then numerator (left to right) of Leibniz's harmonic-like triangle.

Table of values

List of values