A252666 - cp's OEIS frontend

A252666 Let k be the smallest number such that s(k) = odd part of digital sum of 2^k is 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	5
4	4
5	7
6	8
7	47
8	12
9	42
10	19
11	20
12	24
13	23
14	28
15	31
16	76
17	35
18	34
19	38
20	39
21	48
22	52
23	116
24	63
25	0
26	140
27	68
28	81
29	66
30	89
31	96
32	198
33	97
34	92
35	415
36	94
37	0
38	229
39	119
40	121
41	539
42	132
43	133
44	146
45	292
46	162
47	158
48	148
49	651
50	164
51	153
52	167
53	196
54	165
55	757
56	205
57	201
58	0
59	184
60	175

[5, 4, 7, 8, 47, 12, 42, 19, 20, 24, 23, 28, 31, 76, 35, 34, 38, 39, 48, 52, 116, 63, 0, 140, 68, 81, 66, 89, 96, 198, 97, 92, 415, 94, 0, 229, 119, 121, 539, 132, 133, 146, 292, 162, 158, 148, 651, 164, 153, 167, 196, 165, 757, 205, 201, 0, 184, 175]

cp's OEIS Frontend

A252666 Let k be the smallest number such that s(k) = odd part of digital sum of 2^k is 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	5
4	4
5	7
6	8
7	47
8	12
9	42
10	19
11	20
12	24
13	23
14	28
15	31
16	76
17	35
18	34
19	38
20	39
21	48
22	52
23	116
24	63
25	0
26	140
27	68
28	81
29	66
30	89
31	96
32	198
33	97
34	92
35	415
36	94
37	0
38	229
39	119
40	121
41	539
42	132
43	133
44	146
45	292
46	162
47	158
48	148
49	651
50	164
51	153
52	167
53	196
54	165
55	757
56	205
57	201
58	0
59	184
60	175

n	a(n)
3	5
4	4
5	7
6	8
7	47
8	12
9	42
10	19
11	20
12	24
13	23
14	28
15	31
16	76
17	35
18	34
19	38
20	39
21	48
22	52
23	116
24	63
25	0
26	140
27	68
28	81
29	66
30	89
31	96
32	198
33	97
34	92
35	415
36	94
37	0
38	229
39	119
40	121
41	539
42	132
43	133
44	146
45	292
46	162
47	158
48	148
49	651
50	164
51	153
52	167
53	196
54	165
55	757
56	205
57	201
58	0
59	184
60	175

n	a(n)
3	5
4	4
5	7
6	8
7	47
8	12
9	42
10	19
11	20
12	24
13	23
14	28
15	31
16	76
17	35
18	34
19	38
20	39
21	48
22	52
23	116
24	63
25	0
26	140
27	68
28	81
29	66
30	89
31	96
32	198
33	97
34	92
35	415
36	94
37	0
38	229
39	119
40	121
41	539
42	132
43	133
44	146
45	292
46	162
47	158
48	148
49	651
50	164
51	153
52	167
53	196
54	165
55	757
56	205
57	201
58	0
59	184
60	175