A364682 - cp's OEIS frontend

A364682 Number of iterations of the "x -> sum of squares of digits of x" map (A003132) for n to converge to either 0, 1 or the 8-cycle (37,58,89,145,42,20,4,16).

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

[1, 1, 2, 6, 1, 5, 10, 6, 6, 5, 2, 3, 6, 3, 7, 4, 1, 6, 4, 5, 1, 6, 7, 4, 2, 4, 3, 7, 4, 3, 6, 3, 4, 5, 5, 6, 9, 1, 3, 6, 2, 7, 1, 5, 5, 8, 5, 4, 7, 5, 5, 4, 4, 6, 8, 6, 3, 5, 1, 3, 10, 2, 3, 9, 5, 3, 8, 3, 3, 6, 6, 6, 7, 2, 4, 5, 3, 3, 5, 4, 6, 4, 4, 3, 7, 2]

cp's OEIS Frontend

A364682 Number of iterations of the "x -> sum of squares of digits of x" map (A003132) for n to converge to either 0, 1 or the 8-cycle (37,58,89,145,42,20,4,16).

Table of values

List of values

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

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

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