A252668 - cp's OEIS frontend

A252668 Let k be the smallest number such that s(k) = odd part of digital sum of 5^k is a multiple of prime(n); then a(n)=k, if s(k) = prime(n). Otherwise, or if there is no such k, a(n)=0.

n	a(n)
3	1
4	2
5	5
6	4
7	14
8	6
9	7
10	16
11	21
12	23
13	24
14	0
15	0
16	32
17	19
18	20
19	22
20	186
21	177
22	26
23	29
24	27
25	61
26	236
27	34
28	0
29	36
30	78
31	54
32	0
33	41
34	87
35	43
36	44
37	188
38	0
39	55
40	118
41	229
42	66
43	59
44	70
45	69
46	60
47	58
48	0
49	279
50	147
51	81
52	610
53	74
54	325
55	85
56	101
57	75
58	179
59	0
60	369
61	100
62	97
63	0
64	91
65	193
66	95
67	205

[1, 2, 5, 4, 14, 6, 7, 16, 21, 23, 24, 0, 0, 32, 19, 20, 22, 186, 177, 26, 29, 27, 61, 236, 34, 0, 36, 78, 54, 0, 41, 87, 43, 44, 188, 0, 55, 118, 229, 66, 59, 70, 69, 60, 58, 0, 279, 147, 81, 610, 74, 325, 85, 101, 75, 179, 0, 369, 100, 97, 0, 91, 193, 95, 205]

cp's OEIS Frontend

A252668 Let k be the smallest number such that s(k) = odd part of digital sum of 5^k is a multiple of prime(n); then a(n)=k, if s(k) = prime(n). Otherwise, or if there is no such k, a(n)=0.

Table of values

List of values

n	a(n)
3	1
4	2
5	5
6	4
7	14
8	6
9	7
10	16
11	21
12	23
13	24
14	0
15	0
16	32
17	19
18	20
19	22
20	186
21	177
22	26
23	29
24	27
25	61
26	236
27	34
28	0
29	36
30	78
31	54
32	0
33	41
34	87
35	43
36	44
37	188
38	0
39	55
40	118
41	229
42	66
43	59
44	70
45	69
46	60
47	58
48	0
49	279
50	147
51	81
52	610
53	74
54	325
55	85
56	101
57	75
58	179
59	0
60	369
61	100
62	97
63	0
64	91
65	193
66	95
67	205

n	a(n)
3	1
4	2
5	5
6	4
7	14
8	6
9	7
10	16
11	21
12	23
13	24
14	0
15	0
16	32
17	19
18	20
19	22
20	186
21	177
22	26
23	29
24	27
25	61
26	236
27	34
28	0
29	36
30	78
31	54
32	0
33	41
34	87
35	43
36	44
37	188
38	0
39	55
40	118
41	229
42	66
43	59
44	70
45	69
46	60
47	58
48	0
49	279
50	147
51	81
52	610
53	74
54	325
55	85
56	101
57	75
58	179
59	0
60	369
61	100
62	97
63	0
64	91
65	193
66	95
67	205

n	a(n)
3	1
4	2
5	5
6	4
7	14
8	6
9	7
10	16
11	21
12	23
13	24
14	0
15	0
16	32
17	19
18	20
19	22
20	186
21	177
22	26
23	29
24	27
25	61
26	236
27	34
28	0
29	36
30	78
31	54
32	0
33	41
34	87
35	43
36	44
37	188
38	0
39	55
40	118
41	229
42	66
43	59
44	70
45	69
46	60
47	58
48	0
49	279
50	147
51	81
52	610
53	74
54	325
55	85
56	101
57	75
58	179
59	0
60	369
61	100
62	97
63	0
64	91
65	193
66	95
67	205