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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.

A255343 Numbers n such that there are exactly three 1's in their factorial base representation (A007623).

Table of values

n a(n)
1 9
2 27
3 31
4 32
5 35
6 39
7 45
8 57
9 81
10 105
11 123
12 127
13 128
14 131
15 135
16 141
17 145
18 146
19 149
20 150
21 154
22 157
23 158
24 161
25 163
26 164
27 167
28 171
29 175
30 176
31 179
32 183
33 189
34 195
35 199
36 200
37 203
38 207
39 213
40 219
41 223
42 224
43 227
44 231
45 237
46 249
47 267
48 271
49 272
50 275
51 279
52 285
53 297
54 321
55 345
56 369
57 387
58 391
59 392
60 395
61 399
62 405
63 417
64 441

List of values

[9, 27, 31, 32, 35, 39, 45, 57, 81, 105, 123, 127, 128, 131, 135, 141, 145, 146, 149, 150, 154, 157, 158, 161, 163, 164, 167, 171, 175, 176, 179, 183, 189, 195, 199, 200, 203, 207, 213, 219, 223, 224, 227, 231, 237, 249, 267, 271, 272, 275, 279, 285, 297, 321, 345, 369, 387, 391, 392, 395, 399, 405, 417, 441]

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

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