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 | 4 |
| 2 | 46 |
| 3 | 475 |
| 4 | 4719 |
| 5 | 46534 |
| 6 | 459970 |
| 7 | 4562537 |
| 8 | 45337545 |
| 9 | 451112256 |
| 10 | 4493162026 |
| 11 | 44786187348 |
| 12 | 446664473808 |
| 13 | 4456613596481 |
| 14 | 44480880591963 |
| 15 | 444075310669968 |
| 16 | 4434375640450064 |
| 17 | 44287795522995300 |
| 18 | 442382943864554586 |