A007622 - cp's OEIS frontend

A007622 Consider Leibniz's harmonic triangle (A003506) and look at the non-boundary terms. Sequence gives numbers appearing in denominators, sorted.

n	a(n)
1	6
2	12
3	20
4	30
5	42
6	56
7	60
8	72
9	90
10	105
11	110
12	132
13	140
14	156
15	168
16	182
17	210
18	240
19	252
20	272
21	280
22	306
23	342
24	360
25	380
26	420
27	462
28	495
29	504
30	506
31	552
32	600
33	630
34	650
35	660
36	702
37	756
38	812
39	840
40	858
41	870
42	930
43	992
44	1056
45	1092
46	1122
47	1190
48	1260
49	1320
50	1332

[6, 12, 20, 30, 42, 56, 60, 72, 90, 105, 110, 132, 140, 156, 168, 182, 210, 240, 252, 272, 280, 306, 342, 360, 380, 420, 462, 495, 504, 506, 552, 600, 630, 650, 660, 702, 756, 812, 840, 858, 870, 930, 992, 1056, 1092, 1122, 1190, 1260, 1320, 1332]

cp's OEIS Frontend

A007622 Consider Leibniz's harmonic triangle (A003506) and look at the non-boundary terms. Sequence gives numbers appearing in denominators, sorted.

Table of values

List of values