A025727 - cp's OEIS frontend

A025727 Index of 7^n within sequence of numbers of form 7^i*10^j.

n	a(n)
1	1
2	2
3	4
4	7
5	11
6	16
7	22
8	28
9	35
10	43
11	52
12	62
13	73
14	84
15	96
16	109
17	123
18	138
19	154
20	171
21	188
22	206
23	225
24	245
25	266
26	288
27	310
28	333
29	357
30	382
31	408
32	435
33	463
34	491
35	520
36	550
37	581
38	613
39	646
40	679
41	713
42	748
43	784
44	821
45	859
46	898
47	937
48	977
49	1018
50	1060
51	1103
52	1147
53	1191
54	1236
55	1282
56	1329

[1, 2, 4, 7, 11, 16, 22, 28, 35, 43, 52, 62, 73, 84, 96, 109, 123, 138, 154, 171, 188, 206, 225, 245, 266, 288, 310, 333, 357, 382, 408, 435, 463, 491, 520, 550, 581, 613, 646, 679, 713, 748, 784, 821, 859, 898, 937, 977, 1018, 1060, 1103, 1147, 1191, 1236, 1282, 1329]

cp's OEIS Frontend

A025727 Index of 7^n within sequence of numbers of form 7^i*10^j.

Table of values

List of values