cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A248858 a(n) is number of digits of the smallest term of the sequence A248857 which is of the form 4^n*(5^(2n-1)*10^m-1).

Table of values

n a(n)
1 4
2 5
3 7
4 10
5 14
6 14
7 16
8 17
9 42
10 24
11 47
12 25
13 29
14 39
15 31
16 40
17 41
18 45
19 40
20 69
21 46
22 65
23 807
24 128
25 67
26 89
27 55
28 217
29 87
30 76
31 74
32 72
33 99
34 70
35 75
36 144
37 78
38 213
39 96
40 233
41 114
42 103
43 457
44 108
45 156
46 163
47 140
48 97
49 127
50 270
51 109
52 127
53 167
54 135
55 128
56 131
57 196
58 133
59 309
60 138
61 148
62 140
63 813
64 169
65 135
66 148
67 235
68 7235

List of values

[4, 5, 7, 10, 14, 14, 16, 17, 42, 24, 47, 25, 29, 39, 31, 40, 41, 45, 40, 69, 46, 65, 807, 128, 67, 89, 55, 217, 87, 76, 74, 72, 99, 70, 75, 144, 78, 213, 96, 233, 114, 103, 457, 108, 156, 163, 140, 97, 127, 270, 109, 127, 167, 135, 128, 131, 196, 133, 309, 138, 148, 140, 813, 169, 135, 148, 235, 7235]