A189556 - cp's OEIS frontend

A189556 Prime numbers n such that x' = n has two solutions, where x' is the arithmetic derivative (A003415) of x.

n	a(n)
1	31
2	61
3	71
4	101
5	103
6	131
7	199
8	211
9	241
10	269
11	359
12	401
13	421
14	433
15	439
16	571
17	619
18	641
19	661
20	719
21	727
22	739
23	751
24	761
25	811
26	1019
27	1051
28	1063
29	1193
30	1277
31	1279
32	1303
33	1307
34	1321
35	1451
36	1471
37	1499
38	1613
39	1619
40	1667
41	1697
42	1721
43	1723
44	1783
45	1879
46	1949

[31, 61, 71, 101, 103, 131, 199, 211, 241, 269, 359, 401, 421, 433, 439, 571, 619, 641, 661, 719, 727, 739, 751, 761, 811, 1019, 1051, 1063, 1193, 1277, 1279, 1303, 1307, 1321, 1451, 1471, 1499, 1613, 1619, 1667, 1697, 1721, 1723, 1783, 1879, 1949]

cp's OEIS Frontend

A189556 Prime numbers n such that x' = n has two solutions, where x' is the arithmetic derivative (A003415) of x.

Table of values

List of values