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 | 3 |
| 2 | 14 |
| 3 | 161 |
| 4 | 3124 |
| 5 | 181259 |
| 6 | 6732438 |
| 7 | 493478345 |
| 8 | 24995572328 |
| 9 | 2255433009731 |
| 10 | 470444892889498 |
| 11 | 38714638073629151 |
| 12 | 7749166585021832892 |
| 13 | 1203906832960860262109 |
| 14 | 121893712541593098356318 |
| 15 | 17161342484454585041813495 |
| 16 | 4656941131185104848296141136 |
| 17 | 1513056629126772227843475996471 |