A140274 - cp's OEIS frontend

A140274 a(1)=1; a(n)=least nonnegative integer such that the concatenation of all terms, including a(n), is == 1 (mod n).

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

[1, 1, 2, 1, 1, 1, 4, 5, 3, 1, 14, 9, 7, 7, 1, 3, 0, 3, 19, 21, 2, 5, 7, 21, 26, 7, 36, 33, 19, 11, 35, 37, 30, 33, 21, 33, 7, 5, 24, 1, 9, 23, 52, 17, 6, 17, 29, 29, 56, 51, 22, 17, 55, 3, 26, 33, 10, 19, 53, 21, 17, 3, 43, 37, 26, 57, 28, 9, 14, 31, 22, 73, 65, 59, 26, 69, 80, 19, 17]

cp's OEIS Frontend

A140274 a(1)=1; a(n)=least nonnegative integer such that the concatenation of all terms, including a(n), is == 1 (mod n).

Table of values

List of values

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

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

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