A369669 - cp's OEIS frontend

A369669 The greatest common divisor of the first and the second arithmetic derivative of n.

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

[0, 0, 1, 1, 4, 1, 1, 1, 4, 1, 1, 1, 16, 1, 3, 4, 16, 1, 1, 1, 4, 1, 1, 1, 4, 1, 1, 27, 16, 1, 1, 1, 16, 1, 1, 4, 4, 1, 1, 16, 4, 1, 1, 1, 16, 1, 5, 1, 16, 1, 3, 4, 4, 1, 27, 16, 4, 1, 1, 1, 4, 1, 1, 1, 64, 3, 1, 1, 12, 1, 1, 1, 4, 1, 1, 1, 16, 3, 1, 1, 16, 108, 1, 1, 4, 1, 3, 16, 4, 1, 1, 4, 16, 1, 7, 4, 16, 1, 1, 5]

cp's OEIS Frontend

A369669 The greatest common divisor of the first and the second arithmetic derivative of n.

Table of values

List of values

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

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

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