A082878 - cp's OEIS frontend

A082878 Arithmetic derivative of numbers of the form p*q^k with distinct primes p and q, k > 0.

n	a(n)
1	5
2	7
3	16
4	9
5	8
6	21
7	24
8	10
9	13
10	44
11	15
12	32
13	14
14	19
15	12
16	21
17	16
18	68
19	48
20	39
21	25
22	112
23	45
24	20
25	56
26	81
27	16
28	92
29	22
30	31
31	33
32	51
33	18
34	72
35	26
36	39
37	55
38	80
39	18
40	176
41	43
42	22
43	45
44	32
45	140
46	20
47	96
48	34
49	49
50	24
51	272
52	77
53	75
54	164
55	55
56	40
57	240
58	28
59	120
60	87
61	61
62	24
63	63
64	44
65	128
66	46
67	26
68	69

[5, 7, 16, 9, 8, 21, 24, 10, 13, 44, 15, 32, 14, 19, 12, 21, 16, 68, 48, 39, 25, 112, 45, 20, 56, 81, 16, 92, 22, 31, 33, 51, 18, 72, 26, 39, 55, 80, 18, 176, 43, 22, 45, 32, 140, 20, 96, 34, 49, 24, 272, 77, 75, 164, 55, 40, 240, 28, 120, 87, 61, 24, 63, 44, 128, 46, 26, 69]

cp's OEIS Frontend

A082878 Arithmetic derivative of numbers of the form p*q^k with distinct primes p and q, k > 0.

Table of values

List of values

n	a(n)
1	5
2	7
3	16
4	9
5	8
6	21
7	24
8	10
9	13
10	44
11	15
12	32
13	14
14	19
15	12
16	21
17	16
18	68
19	48
20	39
21	25
22	112
23	45
24	20
25	56
26	81
27	16
28	92
29	22
30	31
31	33
32	51
33	18
34	72
35	26
36	39
37	55
38	80
39	18
40	176
41	43
42	22
43	45
44	32
45	140
46	20
47	96
48	34
49	49
50	24
51	272
52	77
53	75
54	164
55	55
56	40
57	240
58	28
59	120
60	87
61	61
62	24
63	63
64	44
65	128
66	46
67	26
68	69

n	a(n)
1	5
2	7
3	16
4	9
5	8
6	21
7	24
8	10
9	13
10	44
11	15
12	32
13	14
14	19
15	12
16	21
17	16
18	68
19	48
20	39
21	25
22	112
23	45
24	20
25	56
26	81
27	16
28	92
29	22
30	31
31	33
32	51
33	18
34	72
35	26
36	39
37	55
38	80
39	18
40	176
41	43
42	22
43	45
44	32
45	140
46	20
47	96
48	34
49	49
50	24
51	272
52	77
53	75
54	164
55	55
56	40
57	240
58	28
59	120
60	87
61	61
62	24
63	63
64	44
65	128
66	46
67	26
68	69

n	a(n)
1	5
2	7
3	16
4	9
5	8
6	21
7	24
8	10
9	13
10	44
11	15
12	32
13	14
14	19
15	12
16	21
17	16
18	68
19	48
20	39
21	25
22	112
23	45
24	20
25	56
26	81
27	16
28	92
29	22
30	31
31	33
32	51
33	18
34	72
35	26
36	39
37	55
38	80
39	18
40	176
41	43
42	22
43	45
44	32
45	140
46	20
47	96
48	34
49	49
50	24
51	272
52	77
53	75
54	164
55	55
56	40
57	240
58	28
59	120
60	87
61	61
62	24
63	63
64	44
65	128
66	46
67	26
68	69