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 | 20 |
| 2 | 273 |
| 3 | 3208 |
| 4 | 35069 |
| 5 | 368988 |
| 6 | 3800761 |
| 7 | 38676176 |
| 8 | 390782997 |
| 9 | 3931986916 |
| 10 | 39464899409 |
| 11 | 395519441304 |
| 12 | 3960417893485 |
| 13 | 39635522209004 |
| 14 | 396543288909417 |
| 15 | 3966561311533792 |
| 16 | 39672383714545733 |
| 17 | 396764460934414452 |
| 18 | 3967888352659017985 |
| 19 | 39680345988222812840 |