A252459 - cp's OEIS frontend

A252459 a(n) = Number of iterations of A003961 starting from n which are needed before the result is one of the numbers in A251726. a(1) = 0 by convention.

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

[0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 2, 0, 2, 0, 1, 0, 0, 1, 2, 0, 0, 0, 3, 1, 1, 0, 2, 0, 2, 0, 3, 0, 0, 0, 1, 1, 2, 0, 0, 0, 2, 1, 3, 0, 1, 0, 3, 0, 0, 0, 2, 0, 2, 2, 2, 0, 0, 0, 3, 0, 3, 0, 2, 0, 1, 0, 4, 0, 2, 0, 4, 2, 2, 0, 1, 0, 3, 2, 4, 0, 0, 0, 2, 1, 1, 0, 2, 0, 2, 0, 4, 0, 0, 0, 2, 2, 2, 0, 3, 0, 3, 1, 4, 0, 1]

cp's OEIS Frontend

A252459 a(n) = Number of iterations of A003961 starting from n which are needed before the result is one of the numbers in A251726. a(1) = 0 by convention.

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

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

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