A369642 - cp's OEIS frontend

A369642 Composite numbers k, not squarefree semiprimes, such that k' is a sum of distinct primorial numbers, where k' stands for the arithmetic derivative of k, A003415.

n	a(n)
1	9
2	16
3	28
4	30
5	45
6	108
7	112
8	136
9	189
10	198
11	210
12	212
13	225
14	236
15	244
16	246
17	282
18	290
19	361
20	374
21	399
22	435
23	507
24	1480
25	1940
26	2132
27	2212
28	2308
29	2356
30	2524
31	2655
32	2766
33	2802
34	3018
35	3054
36	3501
37	3590
38	3771
39	3938
40	4225
41	4454
42	4755
43	4809
44	5005
45	5763
46	6123
47	6771
48	9024
49	9936
50	10295
51	11881
52	12221
53	16296
54	22491
55	24389
56	26865

[9, 16, 28, 30, 45, 108, 112, 136, 189, 198, 210, 212, 225, 236, 244, 246, 282, 290, 361, 374, 399, 435, 507, 1480, 1940, 2132, 2212, 2308, 2356, 2524, 2655, 2766, 2802, 3018, 3054, 3501, 3590, 3771, 3938, 4225, 4454, 4755, 4809, 5005, 5763, 6123, 6771, 9024, 9936, 10295, 11881, 12221, 16296, 22491, 24389, 26865]

cp's OEIS Frontend

A369642 Composite numbers k, not squarefree semiprimes, such that k' is a sum of distinct primorial numbers, where k' stands for the arithmetic derivative of k, A003415.

Table of values

List of values