A334872 - cp's OEIS frontend

A334872 Number of steps needed to reach either 1 or one of the "Fermi-Dirac primes" (A050376) when starting from n and iterating with A334870.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	0
12	2
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	4
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	8
29	0
30	3
31	0
32	1
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	5
41	0
42	3
43	0
44	16
45	4
46	1
47	0
48	2
49	0
50	1
51	2
52	32
53	0
54	3
55	4
56	9
57	2
58	1
59	0
60	6
61	0
62	1
63	8
64	2
65	4
66	3
67	0
68	64
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	128
77	8
78	3
79	0
80	4
81	0
82	1
83	0
84	10
85	4
86	1
87	2
88	17
89	0
90	5
91	8
92	256
93	2
94	1
95	4
96	3
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	33
105	6

[0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 2, 0, 0, 1, 0, 4, 2, 1, 0, 3, 0, 1, 2, 8, 0, 3, 0, 1, 2, 1, 4, 2, 0, 1, 2, 5, 0, 3, 0, 16, 4, 1, 0, 2, 0, 1, 2, 32, 0, 3, 4, 9, 2, 1, 0, 6, 0, 1, 8, 2, 4, 3, 0, 64, 2, 5, 0, 3, 0, 1, 2, 128, 8, 3, 0, 4, 0, 1, 0, 10, 4, 1, 2, 17, 0, 5, 8, 256, 2, 1, 4, 3, 0, 1, 16, 2, 0, 3, 0, 33, 6]

cp's OEIS Frontend

A334872 Number of steps needed to reach either 1 or one of the "Fermi-Dirac primes" (A050376) when starting from n and iterating with A334870.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	0
12	2
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	4
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	8
29	0
30	3
31	0
32	1
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	5
41	0
42	3
43	0
44	16
45	4
46	1
47	0
48	2
49	0
50	1
51	2
52	32
53	0
54	3
55	4
56	9
57	2
58	1
59	0
60	6
61	0
62	1
63	8
64	2
65	4
66	3
67	0
68	64
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	128
77	8
78	3
79	0
80	4
81	0
82	1
83	0
84	10
85	4
86	1
87	2
88	17
89	0
90	5
91	8
92	256
93	2
94	1
95	4
96	3
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	33
105	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	0
12	2
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	4
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	8
29	0
30	3
31	0
32	1
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	5
41	0
42	3
43	0
44	16
45	4
46	1
47	0
48	2
49	0
50	1
51	2
52	32
53	0
54	3
55	4
56	9
57	2
58	1
59	0
60	6
61	0
62	1
63	8
64	2
65	4
66	3
67	0
68	64
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	128
77	8
78	3
79	0
80	4
81	0
82	1
83	0
84	10
85	4
86	1
87	2
88	17
89	0
90	5
91	8
92	256
93	2
94	1
95	4
96	3
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	33
105	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	0
12	2
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	4
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	8
29	0
30	3
31	0
32	1
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	5
41	0
42	3
43	0
44	16
45	4
46	1
47	0
48	2
49	0
50	1
51	2
52	32
53	0
54	3
55	4
56	9
57	2
58	1
59	0
60	6
61	0
62	1
63	8
64	2
65	4
66	3
67	0
68	64
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	128
77	8
78	3
79	0
80	4
81	0
82	1
83	0
84	10
85	4
86	1
87	2
88	17
89	0
90	5
91	8
92	256
93	2
94	1
95	4
96	3
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	33
105	6