A025745 - cp's OEIS frontend

A025745 Index of 10^n within sequence of numbers of form 7^i*10^j.

n	a(n)
1	1
2	3
3	6
4	10
5	15
6	21
7	29
8	38
9	48
10	59
11	71
12	85
13	100
14	116
15	133
16	151
17	170
18	191
19	213
20	236
21	260
22	285
23	312
24	340
25	369
26	399
27	430
28	462
29	496
30	531
31	567
32	604
33	642
34	682
35	723
36	765
37	808
38	852
39	897
40	944
41	992
42	1041
43	1091
44	1142
45	1195
46	1249
47	1304
48	1360
49	1417
50	1475
51	1535
52	1596
53	1658

[1, 3, 6, 10, 15, 21, 29, 38, 48, 59, 71, 85, 100, 116, 133, 151, 170, 191, 213, 236, 260, 285, 312, 340, 369, 399, 430, 462, 496, 531, 567, 604, 642, 682, 723, 765, 808, 852, 897, 944, 992, 1041, 1091, 1142, 1195, 1249, 1304, 1360, 1417, 1475, 1535, 1596, 1658]

cp's OEIS Frontend

A025745 Index of 10^n within sequence of numbers of form 7^i*10^j.

Table of values

List of values