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 | 10 |
| 2 | 105 |
| 3 | 1198 |
| 4 | 14506 |
| 5 | 183284 |
| 6 | 2390121 |
| 7 | 31933830 |
| 8 | 434920398 |
| 9 | 6016012236 |
| 10 | 84289034154 |
| 11 | 1193717733900 |
| 12 | 17060985356980 |
| 13 | 245768668712296 |
| 14 | 3564709196133737 |
| 15 | 52015567131639798 |
| 16 | 763050542202081318 |
| 17 | 11246882679872658140 |
| 18 | 166478073780305341390 |
| 19 | 2473696423451621878180 |