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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 8 |
| 5 | 8 |
| 6 | 159 |
| 7 | 659 |
| 8 | 6824 |
| 9 | 4668 |
| 10 | 517581 |
| 11 | 4941685 |
| 12 | 61043344 |
| 13 | 367628164 |
| 14 | 10269016939 |
| 15 | 147207286503 |
| 16 | 2322683458544 |
| 17 | 19149119743336 |
| 18 | 677630804946393 |
| 19 | 2516289402924117 |
| 20 | 247342217288517496 |
| 21 | 2548438247219028464 |