A081503 - cp's OEIS frontend

A081503 Number of steps to reach a single digit when map in A081502 is iterated.

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

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

cp's OEIS Frontend

A081503 Number of steps to reach a single digit when map in A081502 is iterated.

Table of values

List of values

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

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

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