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 | 5 |
| 3 | 145 |
| 4 | 329 |
| 5 | 381 |
| 6 | 465 |
| 7 | 3121 |
| 8 | 4201 |
| 9 | 4309 |
| 10 | 12669 |
| 11 | 13601 |
| 12 | 17221 |
| 13 | 33601 |
| 14 | 41741 |
| 15 | 46921 |
| 16 | 65745 |
| 17 | 80269 |
| 18 | 384685 |
| 19 | 1072285 |
| 20 | 3482789 |