A241180 - cp's OEIS frontend

A241180 Start with n; add to it any of its digits; repeat; a(n) = minimal number of steps needed to reach a prime greater than n.

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

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

cp's OEIS Frontend

A241180 Start with n; add to it any of its digits; repeat; a(n) = minimal number of steps needed to reach a prime greater than n.

Table of values

List of values

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

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

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