A025709 - cp's OEIS frontend

A025709 Index of 5^n within sequence of numbers of form 5^i*8^j.

n	a(n)
1	1
2	2
3	4
4	7
5	11
6	15
7	20
8	26
9	33
10	40
11	48
12	57
13	67
14	78
15	89
16	101
17	114
18	128
19	142
20	157
21	173
22	190
23	208
24	226
25	245
26	265
27	286
28	307
29	329
30	352
31	376
32	400
33	425
34	451
35	478
36	506
37	534
38	563
39	593
40	624
41	655
42	687
43	720
44	754
45	789
46	824
47	860
48	897
49	935
50	973
51	1012
52	1052
53	1093
54	1135
55	1177
56	1220

[1, 2, 4, 7, 11, 15, 20, 26, 33, 40, 48, 57, 67, 78, 89, 101, 114, 128, 142, 157, 173, 190, 208, 226, 245, 265, 286, 307, 329, 352, 376, 400, 425, 451, 478, 506, 534, 563, 593, 624, 655, 687, 720, 754, 789, 824, 860, 897, 935, 973, 1012, 1052, 1093, 1135, 1177, 1220]

cp's OEIS Frontend

A025709 Index of 5^n within sequence of numbers of form 5^i*8^j.

Table of values

List of values