A178049 - cp's OEIS frontend

A178049 The number of iterations of the map x -> x + d(x) to reach a repdigit (cf. A010785), starting at n, where the decimals of d(x) are the first differences of the decimals of x.

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

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

cp's OEIS Frontend

A178049 The number of iterations of the map x -> x + d(x) to reach a repdigit (cf. A010785), starting at n, where the decimals of d(x) are the first differences of the decimals of x.

Table of values

List of values

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

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

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