A189558 - cp's OEIS frontend

A189558 Least number k>0 such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x.

n	a(n)
0	2
1	4
2	10
3	16
4	24
5	54
6	48
7	60
8	84
9	90
10	114
11	144
12	150
13	120
14	168
15	234
16	216
17	252
18	288
19	210
20	354
21	240
22	432
23	360
24	330
25	552
26	456
27	390
28	462
29	480
30	546
31	420
32	510
33	600
34	672
35	792
36	756
37	714
38	798
39	690
40	720
41	630
42	1116
43	1026
44	930
45	780
46	870
47	960
48	900
49	924
50	1134
51	1296
52	840

[2, 4, 10, 16, 24, 54, 48, 60, 84, 90, 114, 144, 150, 120, 168, 234, 216, 252, 288, 210, 354, 240, 432, 360, 330, 552, 456, 390, 462, 480, 546, 420, 510, 600, 672, 792, 756, 714, 798, 690, 720, 630, 1116, 1026, 930, 780, 870, 960, 900, 924, 1134, 1296, 840]

cp's OEIS Frontend

A189558 Least number k>0 such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x.

Table of values

List of values