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.

A135205 Numbers m for which Sum_digits(m!!) is a multiple of Sum_digits(m).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 6
6 9
7 10
8 11
9 12
10 15
11 18
12 20
13 21
14 24
15 25
16 27
17 30
18 32
19 33
20 36
21 42
22 45
23 46
24 54
25 55
26 63
27 72
28 75
29 81
30 88
31 90
32 91
33 93
34 100
35 101
36 102
37 105
38 108
39 111
40 112
41 117
42 120
43 121
44 122
45 123
46 124
47 126
48 127
49 135
50 141
51 144
52 153
53 154
54 156
55 162
56 171
57 176
58 180
59 182
60 189
61 198

List of values

[1, 2, 3, 4, 6, 9, 10, 11, 12, 15, 18, 20, 21, 24, 25, 27, 30, 32, 33, 36, 42, 45, 46, 54, 55, 63, 72, 75, 81, 88, 90, 91, 93, 100, 101, 102, 105, 108, 111, 112, 117, 120, 121, 122, 123, 124, 126, 127, 135, 141, 144, 153, 154, 156, 162, 171, 176, 180, 182, 189, 198]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.