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.

A045521 Numbers k such that k! has initial digit '2'.

Table of values

n a(n)
1 2
2 4
3 16
4 20
5 23
6 30
7 32
8 34
9 39
10 44
11 47
12 54
13 58
14 68
15 75
16 85
17 86
18 87
19 113
20 114
21 115
22 126
23 135
24 142
25 148
26 153
27 159
28 163
29 168
30 172
31 180
32 184
33 188
34 195
35 205
36 208
37 211
38 214
39 217
40 220
41 223
42 226
43 234
44 237
45 242
46 247
47 252
48 257
49 262
50 269
51 276
52 278
53 287
54 289
55 302
56 304

List of values

[2, 4, 16, 20, 23, 30, 32, 34, 39, 44, 47, 54, 58, 68, 75, 85, 86, 87, 113, 114, 115, 126, 135, 142, 148, 153, 159, 163, 168, 172, 180, 184, 188, 195, 205, 208, 211, 214, 217, 220, 223, 226, 234, 237, 242, 247, 252, 257, 262, 269, 276, 278, 287, 289, 302, 304]