A189560 - cp's OEIS frontend

A189560 Least odd number k such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x.

n	a(n)
0	3
1	5
2	21
3	75
4	151
5	371
6	671
7	791
8	311
9	551
10	1271
11	1391
12	1031
13	2471
14	2231
15	4271
16	1991
17	3191
18	5351
19	7871
20	7751
21	7031
22	8951
23	8711
24	11831
25	5591
26	19631
27	10391
28	15791
29	20711
30	30071
31	17111
32	30551
33	27191
34	40031
35	31391
36	52631
37	49271
38	35591
39	42311
40	50951
41	92231

[3, 5, 21, 75, 151, 371, 671, 791, 311, 551, 1271, 1391, 1031, 2471, 2231, 4271, 1991, 3191, 5351, 7871, 7751, 7031, 8951, 8711, 11831, 5591, 19631, 10391, 15791, 20711, 30071, 17111, 30551, 27191, 40031, 31391, 52631, 49271, 35591, 42311, 50951, 92231]

cp's OEIS Frontend

A189560 Least odd number k such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x.

Table of values

List of values