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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.

A204085 Consider integers m such that both m and 2m are decimal pandigital numbers (A050278). The sequence gives indices of m in A050278.

Table of values

n a(n)
1 1
2 3
3 7
4 9
5 13
6 15
7 25
8 27
9 31
10 33
11 37
12 39
13 49
14 51
15 55
16 57
17 61
18 63
19 73
20 75
21 79
22 81
23 85
24 87
25 153
26 155
27 156
28 157
29 163
30 166
31 177
32 179
33 180
34 181
35 187
36 190
37 193
38 195
39 217
40 219
41 226
42 232
43 273
44 275
45 276
46 277
47 283
48 286
49 297
50 299
51 300
52 301
53 307
54 310
55 313
56 315
57 337

List of values

[1, 3, 7, 9, 13, 15, 25, 27, 31, 33, 37, 39, 49, 51, 55, 57, 61, 63, 73, 75, 79, 81, 85, 87, 153, 155, 156, 157, 163, 166, 177, 179, 180, 181, 187, 190, 193, 195, 217, 219, 226, 232, 273, 275, 276, 277, 283, 286, 297, 299, 300, 301, 307, 310, 313, 315, 337]

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

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