A063575 - cp's OEIS frontend

A063575 Smallest k such that 4^k has exactly n 0's in its decimal representation.

n	a(n)
0	0
1	5
2	21
3	35
4	47
5	44
6	50
7	51
8	103
9	99
10	121
11	125
12	126
13	175
14	166
15	131
16	185
17	153
18	184
19	223
20	272
21	232
22	248
23	336
24	233
25	306
26	315
27	384
28	314
29	327
30	333
31	373
32	393
33	399
34	454
35	457
36	504
37	453
38	484
39	506
40	621
41	494
42	510
43	639
44	522
45	557
46	560
47	559
48	716
49	609
50	629

[0, 5, 21, 35, 47, 44, 50, 51, 103, 99, 121, 125, 126, 175, 166, 131, 185, 153, 184, 223, 272, 232, 248, 336, 233, 306, 315, 384, 314, 327, 333, 373, 393, 399, 454, 457, 504, 453, 484, 506, 621, 494, 510, 639, 522, 557, 560, 559, 716, 609, 629]

cp's OEIS Frontend

A063575 Smallest k such that 4^k has exactly n 0's in its decimal representation.

Table of values

List of values

n	a(n)
0	0
1	5
2	21
3	35
4	47
5	44
6	50
7	51
8	103
9	99
10	121
11	125
12	126
13	175
14	166
15	131
16	185
17	153
18	184
19	223
20	272
21	232
22	248
23	336
24	233
25	306
26	315
27	384
28	314
29	327
30	333
31	373
32	393
33	399
34	454
35	457
36	504
37	453
38	484
39	506
40	621
41	494
42	510
43	639
44	522
45	557
46	560
47	559
48	716
49	609
50	629

n	a(n)
0	0
1	5
2	21
3	35
4	47
5	44
6	50
7	51
8	103
9	99
10	121
11	125
12	126
13	175
14	166
15	131
16	185
17	153
18	184
19	223
20	272
21	232
22	248
23	336
24	233
25	306
26	315
27	384
28	314
29	327
30	333
31	373
32	393
33	399
34	454
35	457
36	504
37	453
38	484
39	506
40	621
41	494
42	510
43	639
44	522
45	557
46	560
47	559
48	716
49	609
50	629

n	a(n)
0	0
1	5
2	21
3	35
4	47
5	44
6	50
7	51
8	103
9	99
10	121
11	125
12	126
13	175
14	166
15	131
16	185
17	153
18	184
19	223
20	272
21	232
22	248
23	336
24	233
25	306
26	315
27	384
28	314
29	327
30	333
31	373
32	393
33	399
34	454
35	457
36	504
37	453
38	484
39	506
40	621
41	494
42	510
43	639
44	522
45	557
46	560
47	559
48	716
49	609
50	629