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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 22 |
| 5 | 59 |
| 6 | 160 |
| 7 | 431 |
| 8 | 1164 |
| 9 | 3140 |
| 10 | 8474 |
| 11 | 22864 |
| 12 | 61697 |
| 13 | 166476 |
| 14 | 449210 |
| 15 | 1212113 |
| 16 | 3270684 |
| 17 | 8825376 |
| 18 | 23813776 |
| 19 | 64257396 |
| 20 | 173387612 |
| 21 | 467856828 |
| 22 | 1262431711 |
| 23 | 3406456212 |
| 24 | 9191739970 |
| 25 | 24802339472 |
| 26 | 66924874539 |
| 27 | 180585336876 |
| 28 | 487278670744 |
| 29 | 1314838220172 |