A063610 - cp's OEIS frontend

A063610 Smallest k such that 7^k has exactly n 4's in its decimal representation.

n	a(n)
0	1
1	2
2	10
3	15
4	26
5	32
6	33
7	58
8	62
9	50
10	46
11	89
12	102
13	108
14	90
15	118
16	130
17	122
18	146
19	144
20	112
21	138
22	196
23	224
24	226
25	212
26	256
27	250
28	259
29	239
30	218
31	254
32	386
33	260
34	318
35	292
36	353
37	321
38	358
39	326
40	392
41	401
42	330
43	396
44	427
45	442
46	438
47	443
48	450
49	449
50	474

[1, 2, 10, 15, 26, 32, 33, 58, 62, 50, 46, 89, 102, 108, 90, 118, 130, 122, 146, 144, 112, 138, 196, 224, 226, 212, 256, 250, 259, 239, 218, 254, 386, 260, 318, 292, 353, 321, 358, 326, 392, 401, 330, 396, 427, 442, 438, 443, 450, 449, 474]

cp's OEIS Frontend

A063610 Smallest k such that 7^k has exactly n 4's in its decimal representation.

Table of values

List of values

n	a(n)
0	1
1	2
2	10
3	15
4	26
5	32
6	33
7	58
8	62
9	50
10	46
11	89
12	102
13	108
14	90
15	118
16	130
17	122
18	146
19	144
20	112
21	138
22	196
23	224
24	226
25	212
26	256
27	250
28	259
29	239
30	218
31	254
32	386
33	260
34	318
35	292
36	353
37	321
38	358
39	326
40	392
41	401
42	330
43	396
44	427
45	442
46	438
47	443
48	450
49	449
50	474

n	a(n)
0	1
1	2
2	10
3	15
4	26
5	32
6	33
7	58
8	62
9	50
10	46
11	89
12	102
13	108
14	90
15	118
16	130
17	122
18	146
19	144
20	112
21	138
22	196
23	224
24	226
25	212
26	256
27	250
28	259
29	239
30	218
31	254
32	386
33	260
34	318
35	292
36	353
37	321
38	358
39	326
40	392
41	401
42	330
43	396
44	427
45	442
46	438
47	443
48	450
49	449
50	474

n	a(n)
0	1
1	2
2	10
3	15
4	26
5	32
6	33
7	58
8	62
9	50
10	46
11	89
12	102
13	108
14	90
15	118
16	130
17	122
18	146
19	144
20	112
21	138
22	196
23	224
24	226
25	212
26	256
27	250
28	259
29	239
30	218
31	254
32	386
33	260
34	318
35	292
36	353
37	321
38	358
39	326
40	392
41	401
42	330
43	396
44	427
45	442
46	438
47	443
48	450
49	449
50	474