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 | 17 |
| 2 | 178 |
| 3 | 1477 |
| 4 | 10654 |
| 5 | 69930 |
| 6 | 428772 |
| 7 | 2496813 |
| 8 | 13962982 |
| 9 | 75582078 |
| 10 | 398302268 |
| 11 | 2052354850 |
| 12 | 10375356460 |
| 13 | 51596749300 |
| 14 | 252953904072 |
| 15 | 1224672639357 |
| 16 | 5863899363510 |
| 17 | 27801377704310 |
| 18 | 130648178243660 |
| 19 | 609082400931158 |