A190144 - cp's OEIS frontend

A190144 Decimal expansion of Sum_{k>=2} (1/Product_{j=2..k} j'), where n' is the arithmetic derivative of n.

n	a(n)
1	2
2	6
3	0
4	5
5	0
6	7
7	2
8	7
9	0
10	5
11	2
12	9
13	7
14	3
15	2
16	2
17	8
18	7
19	0
20	8
21	0
22	3
23	4
24	2
25	6
26	4
27	1
28	2
29	4
30	1
31	8
32	3
33	8
34	7
35	8
36	5
37	1
38	3
39	7
40	0
41	8
42	5
43	7
44	3
45	6
46	3
47	2
48	7
49	6
50	6
51	3
52	7
53	2
54	2
55	4
56	3
57	8
58	5
59	8
60	5
61	0
62	8
63	4
64	0
65	7
66	3
67	1
68	0
69	5
70	7
71	5
72	9
73	3
74	7
75	1
76	6
77	1
78	9
79	7
80	5
81	1
82	7
83	0
84	4
85	7
86	7
87	4
88	9
89	9
90	4
91	5
92	4
93	7
94	4
95	8
96	4
97	5
98	6
99	1
100	7
101	0
102	8
103	8
104	9
105	4
106	7
107	7
108	6
109	2
110	0
111	9
112	5
113	9
114	7
115	8
116	5
117	2
118	4
119	4
120	7

[2, 6, 0, 5, 0, 7, 2, 7, 0, 5, 2, 9, 7, 3, 2, 2, 8, 7, 0, 8, 0, 3, 4, 2, 6, 4, 1, 2, 4, 1, 8, 3, 8, 7, 8, 5, 1, 3, 7, 0, 8, 5, 7, 3, 6, 3, 2, 7, 6, 6, 3, 7, 2, 2, 4, 3, 8, 5, 8, 5, 0, 8, 4, 0, 7, 3, 1, 0, 5, 7, 5, 9, 3, 7, 1, 6, 1, 9, 7, 5, 1, 7, 0, 4, 7, 7, 4, 9, 9, 4, 5, 4, 7, 4, 8, 4, 5, 6, 1, 7, 0, 8, 8, 9, 4, 7, 7, 6, 2, 0, 9, 5, 9, 7, 8, 5, 2, 4, 4, 7]

cp's OEIS Frontend

A190144 Decimal expansion of Sum_{k>=2} (1/Product_{j=2..k} j'), where n' is the arithmetic derivative of n.

Table of values

List of values

n	a(n)
1	2
2	6
3	0
4	5
5	0
6	7
7	2
8	7
9	0
10	5
11	2
12	9
13	7
14	3
15	2
16	2
17	8
18	7
19	0
20	8
21	0
22	3
23	4
24	2
25	6
26	4
27	1
28	2
29	4
30	1
31	8
32	3
33	8
34	7
35	8
36	5
37	1
38	3
39	7
40	0
41	8
42	5
43	7
44	3
45	6
46	3
47	2
48	7
49	6
50	6
51	3
52	7
53	2
54	2
55	4
56	3
57	8
58	5
59	8
60	5
61	0
62	8
63	4
64	0
65	7
66	3
67	1
68	0
69	5
70	7
71	5
72	9
73	3
74	7
75	1
76	6
77	1
78	9
79	7
80	5
81	1
82	7
83	0
84	4
85	7
86	7
87	4
88	9
89	9
90	4
91	5
92	4
93	7
94	4
95	8
96	4
97	5
98	6
99	1
100	7
101	0
102	8
103	8
104	9
105	4
106	7
107	7
108	6
109	2
110	0
111	9
112	5
113	9
114	7
115	8
116	5
117	2
118	4
119	4
120	7

n	a(n)
1	2
2	6
3	0
4	5
5	0
6	7
7	2
8	7
9	0
10	5
11	2
12	9
13	7
14	3
15	2
16	2
17	8
18	7
19	0
20	8
21	0
22	3
23	4
24	2
25	6
26	4
27	1
28	2
29	4
30	1
31	8
32	3
33	8
34	7
35	8
36	5
37	1
38	3
39	7
40	0
41	8
42	5
43	7
44	3
45	6
46	3
47	2
48	7
49	6
50	6
51	3
52	7
53	2
54	2
55	4
56	3
57	8
58	5
59	8
60	5
61	0
62	8
63	4
64	0
65	7
66	3
67	1
68	0
69	5
70	7
71	5
72	9
73	3
74	7
75	1
76	6
77	1
78	9
79	7
80	5
81	1
82	7
83	0
84	4
85	7
86	7
87	4
88	9
89	9
90	4
91	5
92	4
93	7
94	4
95	8
96	4
97	5
98	6
99	1
100	7
101	0
102	8
103	8
104	9
105	4
106	7
107	7
108	6
109	2
110	0
111	9
112	5
113	9
114	7
115	8
116	5
117	2
118	4
119	4
120	7

n	a(n)
1	2
2	6
3	0
4	5
5	0
6	7
7	2
8	7
9	0
10	5
11	2
12	9
13	7
14	3
15	2
16	2
17	8
18	7
19	0
20	8
21	0
22	3
23	4
24	2
25	6
26	4
27	1
28	2
29	4
30	1
31	8
32	3
33	8
34	7
35	8
36	5
37	1
38	3
39	7
40	0
41	8
42	5
43	7
44	3
45	6
46	3
47	2
48	7
49	6
50	6
51	3
52	7
53	2
54	2
55	4
56	3
57	8
58	5
59	8
60	5
61	0
62	8
63	4
64	0
65	7
66	3
67	1
68	0
69	5
70	7
71	5
72	9
73	3
74	7
75	1
76	6
77	1
78	9
79	7
80	5
81	1
82	7
83	0
84	4
85	7
86	7
87	4
88	9
89	9
90	4
91	5
92	4
93	7
94	4
95	8
96	4
97	5
98	6
99	1
100	7
101	0
102	8
103	8
104	9
105	4
106	7
107	7
108	6
109	2
110	0
111	9
112	5
113	9
114	7
115	8
116	5
117	2
118	4
119	4
120	7