A068346 - cp's OEIS frontend

A068346 a(n) = n'' = second arithmetic derivative of n.

n	a(n)
0	0
1	0
2	0
3	0
4	4
5	0
6	1
7	0
8	16
9	5
10	1
11	0
12	32
13	0
14	6
15	12
16	80
17	0
18	10
19	0
20	44
21	7
22	1
23	0
24	48
25	7
26	8
27	27
28	80
29	0
30	1
31	0
32	176
33	9
34	1
35	16
36	92
37	0
38	10
39	32
40	72
41	0
42	1
43	0
44	112
45	16
46	10
47	0
48	240
49	9
50	39
51	24
52	92
53	0
54	108
55	32
56	96
57	13
58	1
59	0
60	96
61	0
62	14
63	20
64	640
65	21
66	1
67	0
68	156
69	15
70	1
71	0
72	220
73	0
74	16
75	16
76	176
77	21
78	1
79	0
80	368
81	216

[0, 0, 0, 0, 4, 0, 1, 0, 16, 5, 1, 0, 32, 0, 6, 12, 80, 0, 10, 0, 44, 7, 1, 0, 48, 7, 8, 27, 80, 0, 1, 0, 176, 9, 1, 16, 92, 0, 10, 32, 72, 0, 1, 0, 112, 16, 10, 0, 240, 9, 39, 24, 92, 0, 108, 32, 96, 13, 1, 0, 96, 0, 14, 20, 640, 21, 1, 0, 156, 15, 1, 0, 220, 0, 16, 16, 176, 21, 1, 0, 368, 216]

cp's OEIS Frontend

A068346 a(n) = n'' = second arithmetic derivative of n.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	4
5	0
6	1
7	0
8	16
9	5
10	1
11	0
12	32
13	0
14	6
15	12
16	80
17	0
18	10
19	0
20	44
21	7
22	1
23	0
24	48
25	7
26	8
27	27
28	80
29	0
30	1
31	0
32	176
33	9
34	1
35	16
36	92
37	0
38	10
39	32
40	72
41	0
42	1
43	0
44	112
45	16
46	10
47	0
48	240
49	9
50	39
51	24
52	92
53	0
54	108
55	32
56	96
57	13
58	1
59	0
60	96
61	0
62	14
63	20
64	640
65	21
66	1
67	0
68	156
69	15
70	1
71	0
72	220
73	0
74	16
75	16
76	176
77	21
78	1
79	0
80	368
81	216

n	a(n)
0	0
1	0
2	0
3	0
4	4
5	0
6	1
7	0
8	16
9	5
10	1
11	0
12	32
13	0
14	6
15	12
16	80
17	0
18	10
19	0
20	44
21	7
22	1
23	0
24	48
25	7
26	8
27	27
28	80
29	0
30	1
31	0
32	176
33	9
34	1
35	16
36	92
37	0
38	10
39	32
40	72
41	0
42	1
43	0
44	112
45	16
46	10
47	0
48	240
49	9
50	39
51	24
52	92
53	0
54	108
55	32
56	96
57	13
58	1
59	0
60	96
61	0
62	14
63	20
64	640
65	21
66	1
67	0
68	156
69	15
70	1
71	0
72	220
73	0
74	16
75	16
76	176
77	21
78	1
79	0
80	368
81	216

n	a(n)
0	0
1	0
2	0
3	0
4	4
5	0
6	1
7	0
8	16
9	5
10	1
11	0
12	32
13	0
14	6
15	12
16	80
17	0
18	10
19	0
20	44
21	7
22	1
23	0
24	48
25	7
26	8
27	27
28	80
29	0
30	1
31	0
32	176
33	9
34	1
35	16
36	92
37	0
38	10
39	32
40	72
41	0
42	1
43	0
44	112
45	16
46	10
47	0
48	240
49	9
50	39
51	24
52	92
53	0
54	108
55	32
56	96
57	13
58	1
59	0
60	96
61	0
62	14
63	20
64	640
65	21
66	1
67	0
68	156
69	15
70	1
71	0
72	220
73	0
74	16
75	16
76	176
77	21
78	1
79	0
80	368
81	216