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 | 1 |
| 2 | 3 |
| 3 | 15 |
| 4 | 55 |
| 5 | 91 |
| 6 | 153 |
| 7 | 171 |
| 8 | 351 |
| 9 | 595 |
| 10 | 1711 |
| 11 | 1953 |
| 12 | 5151 |
| 13 | 5995 |
| 14 | 9591 |
| 15 | 11175 |
| 16 | 11935 |
| 17 | 15753 |
| 18 | 15931 |
| 19 | 17391 |
| 20 | 17955 |
| 21 | 31375 |
| 22 | 33153 |
| 23 | 35511 |
| 24 | 73153 |
| 25 | 153735 |
| 26 | 171991 |
| 27 | 173755 |
| 28 | 193131 |
| 29 | 193753 |
| 30 | 371953 |
| 31 | 399171 |
| 32 | 513591 |
| 33 | 551775 |
| 34 | 559153 |
| 35 | 571915 |
| 36 | 791911 |
| 37 | 917335 |
| 38 | 939135 |
| 39 | 1335795 |