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.

A162214 a(n) = the largest 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 12
5 30
6 60
7 126
8 248
9 504
10 1020
11 2046
12 4092
13 8190
14 16380
15 32760
16 65520
17 131070
18 262134
19 524286
20 1048560
21 2097144
22 4194300
23 8388606
24 16777200
25 33554425
26 67108860
27 134217702
28 268435440
29 536870910
30 1073741820
31 2147483646
32 4294967264
33 8589934584

List of values

[1, 2, 6, 12, 30, 60, 126, 248, 504, 1020, 2046, 4092, 8190, 16380, 32760, 65520, 131070, 262134, 524286, 1048560, 2097144, 4194300, 8388606, 16777200, 33554425, 67108860, 134217702, 268435440, 536870910, 1073741820, 2147483646, 4294967264, 8589934584]