A352332 - cp's OEIS frontend

A352332 Numbers k for which k = phi(k') + phi(k''), where phi is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346).

n	a(n)
1	4
2	260
3	294
4	740
5	1460
6	3140
7	3860
8	5540
9	8420
10	10820
11	15140
12	19940
13	21860
14	24020
15	24260
16	27620
17	37460
18	40340
19	46820
20	49460
21	55940
22	61220
23	70340
24	85460
25	101540
26	114020
27	124340
28	132740
29	133220
30	144260
31	148340
32	149540
33	155060
34	162020
35	164420
36	167060
37	170420
38	173540

[4, 260, 294, 740, 1460, 3140, 3860, 5540, 8420, 10820, 15140, 19940, 21860, 24020, 24260, 27620, 37460, 40340, 46820, 49460, 55940, 61220, 70340, 85460, 101540, 114020, 124340, 132740, 133220, 144260, 148340, 149540, 155060, 162020, 164420, 167060, 170420, 173540]

cp's OEIS Frontend

A352332 Numbers k for which k = phi(k') + phi(k''), where phi is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346).

Table of values

List of values