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 | 7 |
| 2 | 46 |
| 3 | 299 |
| 4 | 1941 |
| 5 | 12616 |
| 6 | 82160 |
| 7 | 536155 |
| 8 | 3505699 |
| 9 | 22964087 |
| 10 | 150676186 |
| 11 | 990134948 |
| 12 | 6515349244 |
| 13 | 42925973608 |
| 14 | 283134975936 |
| 15 | 1869455684187 |
| 16 | 12355133446527 |
| 17 | 81725384344741 |
| 18 | 541021064605298 |
| 19 | 3584203906519219 |
| 20 | 23761237400402597 |
| 21 | 157623924396214756 |
| 22 | 1046244086051121248 |