A181614 - cp's OEIS frontend

A181614 a(n) = number of steps needed to reach a Harshad number when the map k->A062028(l) is iterated starting at n, or -1 if a Harshad number is never reached.

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

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 0, 24, 3, 1, 6, 23, 0, 2, 0, 0, 7, 5, 0, 22, 6, 0, 4, 1, 0, 3, 21, 5, 5, 2, 0, 20, 3, 4, 0, 4, 0, 1, 26, 0, 3, 19, 0, 2, 0, 3, 25, 26, 0, 9, 2, 2, 18, 24, 0, 25, 1, 0, 23, 8, 4, 1, 24, 1, 0, 17, 0, 23, 22, 2, 7, 24, 3, 16, 0, 0, 23, 22, 0]

cp's OEIS Frontend

A181614 a(n) = number of steps needed to reach a Harshad number when the map k->A062028(l) is iterated starting at n, or -1 if a Harshad number is never reached.

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

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

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