A376713 - cp's OEIS frontend

A376713 a(n) is the minimum number with exactly n triples (u,m,v) of divisors such that u < v and m^2 is the harmonic mean of u^2 and v^2.

n	a(n)
1	35
2	70
3	140
4	210
5	560
6	420
7	2240
8	840
9	1260
10	1680
11	35840
12	2100
13	143360
14	6720
15	5040
16	4200
17	1709435
18	6300
19	645575
20	8400
21	20160
22	77350
23	36728125
24	12600
25	45360
26	430080
27	31500
28	33600
29	1117484375
30	25200
31	24171875
32	29400
33	154700
34	3418870
35	181440
36	44100
37	31633175
38	1291150

[35, 70, 140, 210, 560, 420, 2240, 840, 1260, 1680, 35840, 2100, 143360, 6720, 5040, 4200, 1709435, 6300, 645575, 8400, 20160, 77350, 36728125, 12600, 45360, 430080, 31500, 33600, 1117484375, 25200, 24171875, 29400, 154700, 3418870, 181440, 44100, 31633175, 1291150]

cp's OEIS Frontend

A376713 a(n) is the minimum number with exactly n triples (u,m,v) of divisors such that u < v and m^2 is the harmonic mean of u^2 and v^2.

Table of values

List of values