A377087 - cp's OEIS frontend

A377087 Number of cycles under iteration of the map sending a positive integer to the product of its leading base-n digit and the sum of the squares of its base-n digits.

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

[0, 1, 0, 1, 2, 1, 2, 0, 3, 2, 5, 2, 4, 1, 3, 3, 3, 2, 3, 4, 1, 5, 3, 7, 2, 3, 3, 3, 4, 4, 5, 3, 6, 12, 2, 1, 3, 2, 6, 10, 4, 8, 6, 3, 4, 2, 3, 1, 3, 4, 9, 3, 2, 2, 5, 7, 4, 8, 7, 5, 6, 6, 6, 1, 8, 7, 4, 6, 6, 2, 5, 7, 5, 5, 4, 5, 3, 4, 3, 5, 2, 4, 7, 8, 3, 7, 7]

cp's OEIS Frontend

A377087 Number of cycles under iteration of the map sending a positive integer to the product of its leading base-n digit and the sum of the squares of its base-n digits.

Table of values

List of values

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

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

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