A374214 - cp's OEIS frontend

A374214 a(n) is the minimum value of A347381 obtained among all proper divisors of n larger than 1, where A347381 is the distance from n to the nearest common ancestor of n and sigma(n) in the Doudna-tree (A005940). By convention a(1) = a(p) = 0 for all primes p.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	0
21	1
22	0
23	0
24	0
25	1
26	0
27	1
28	0
29	0
30	0
31	0
32	0
33	1
34	0
35	1
36	0
37	0
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	3
50	0
51	1
52	0
53	0
54	0
55	1
56	0
57	1
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	1
66	0
67	0
68	0
69	1
70	0
71	0
72	0
73	0
74	0
75	1
76	0
77	3
78	0
79	0
80	0
81	1
82	0
83	0
84	0
85	1
86	0
87	1
88	0
89	0
90	0
91	2
92	0
93	1
94	0
95	1
96	0
97	0
98	0
99	1
100	0
101	0
102	0
103	0
104	0
105	1
106	0
107	0
108	0
109	0
110	0
111	1
112	0
113	0
114	0
115	1
116	0
117	1
118	0
119	3
120	0
121	3

[0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 3, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 3, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 3, 0, 3]

cp's OEIS Frontend

A374214 a(n) is the minimum value of A347381 obtained among all proper divisors of n larger than 1, where A347381 is the distance from n to the nearest common ancestor of n and sigma(n) in the Doudna-tree (A005940). By convention a(1) = a(p) = 0 for all primes p.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	0
21	1
22	0
23	0
24	0
25	1
26	0
27	1
28	0
29	0
30	0
31	0
32	0
33	1
34	0
35	1
36	0
37	0
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	3
50	0
51	1
52	0
53	0
54	0
55	1
56	0
57	1
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	1
66	0
67	0
68	0
69	1
70	0
71	0
72	0
73	0
74	0
75	1
76	0
77	3
78	0
79	0
80	0
81	1
82	0
83	0
84	0
85	1
86	0
87	1
88	0
89	0
90	0
91	2
92	0
93	1
94	0
95	1
96	0
97	0
98	0
99	1
100	0
101	0
102	0
103	0
104	0
105	1
106	0
107	0
108	0
109	0
110	0
111	1
112	0
113	0
114	0
115	1
116	0
117	1
118	0
119	3
120	0
121	3

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	0
21	1
22	0
23	0
24	0
25	1
26	0
27	1
28	0
29	0
30	0
31	0
32	0
33	1
34	0
35	1
36	0
37	0
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	3
50	0
51	1
52	0
53	0
54	0
55	1
56	0
57	1
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	1
66	0
67	0
68	0
69	1
70	0
71	0
72	0
73	0
74	0
75	1
76	0
77	3
78	0
79	0
80	0
81	1
82	0
83	0
84	0
85	1
86	0
87	1
88	0
89	0
90	0
91	2
92	0
93	1
94	0
95	1
96	0
97	0
98	0
99	1
100	0
101	0
102	0
103	0
104	0
105	1
106	0
107	0
108	0
109	0
110	0
111	1
112	0
113	0
114	0
115	1
116	0
117	1
118	0
119	3
120	0
121	3

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	0
21	1
22	0
23	0
24	0
25	1
26	0
27	1
28	0
29	0
30	0
31	0
32	0
33	1
34	0
35	1
36	0
37	0
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	3
50	0
51	1
52	0
53	0
54	0
55	1
56	0
57	1
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	1
66	0
67	0
68	0
69	1
70	0
71	0
72	0
73	0
74	0
75	1
76	0
77	3
78	0
79	0
80	0
81	1
82	0
83	0
84	0
85	1
86	0
87	1
88	0
89	0
90	0
91	2
92	0
93	1
94	0
95	1
96	0
97	0
98	0
99	1
100	0
101	0
102	0
103	0
104	0
105	1
106	0
107	0
108	0
109	0
110	0
111	1
112	0
113	0
114	0
115	1
116	0
117	1
118	0
119	3
120	0
121	3