A347879 - cp's OEIS frontend

A347879 The nearest common ancestor of n and sigma(n) in the Doudna tree (A005940).

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

[1, 2, 2, 2, 3, 6, 2, 2, 2, 2, 3, 3, 7, 3, 6, 2, 2, 2, 5, 10, 2, 2, 3, 6, 2, 5, 2, 28, 3, 2, 2, 2, 3, 2, 6, 2, 19, 3, 7, 3, 5, 3, 11, 5, 3, 2, 3, 3, 2, 2, 2, 2, 2, 2, 2, 3, 5, 3, 3, 3, 31, 3, 5, 2, 5, 2, 17, 5, 3, 2, 2, 2, 37, 17, 2, 3, 6, 5, 5, 5, 4, 5, 5, 5, 2, 7, 3, 3, 3, 3, 5, 5, 2, 2, 3, 3, 2, 2, 7, 2, 13, 2]

cp's OEIS Frontend

A347879 The nearest common ancestor of n and sigma(n) in the Doudna tree (A005940).

Table of values

List of values

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

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

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