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.
| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 45 |
| 3 | 63 |
| 4 | 117 |
| 5 | 153 |
| 6 | 585 |
| 7 | 2169 |
| 8 | 4005 |
| 9 | 9945 |
| 10 | 13833 |
| 11 | 17865 |
| 12 | 27261 |
| 13 | 33201 |
| 14 | 36873 |
| 15 | 40833 |
| 16 | 57681 |
| 17 | 69345 |
| 18 | 69921 |
| 19 | 95085 |
| 20 | 140985 |
| 21 | 155961 |
| 22 | 161721 |
| 23 | 171405 |
| 24 | 186201 |
| 25 | 189441 |
| 26 | 192465 |
| 27 | 203841 |
| 28 | 240471 |
| 29 | 242451 |
| 30 | 244413 |
| 31 | 316881 |
| 32 | 321201 |
| 33 | 406341 |
| 34 | 481041 |
| 35 | 482769 |
| 36 | 488709 |
| 37 | 501921 |