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.

A162213 a(n) = the smallest positive multiple of n with exactly n digits when written in binary.

Table of values

n a(n)
1 1
2 2
3 6
4 8
5 20
6 36
7 70
8 128
9 261
10 520
11 1034
12 2052
13 4108
14 8204
15 16395
16 32768
17 65552
18 131076
19 262162
20 524300
21 1048593
22 2097172
23 4194326
24 8388624
25 16777225
26 33554456
27 67108878
28 134217748
29 268435484
30 536870940
31 1073741854
32 2147483648

List of values

[1, 2, 6, 8, 20, 36, 70, 128, 261, 520, 1034, 2052, 4108, 8204, 16395, 32768, 65552, 131076, 262162, 524300, 1048593, 2097172, 4194326, 8388624, 16777225, 33554456, 67108878, 134217748, 268435484, 536870940, 1073741854, 2147483648]