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) |
|---|---|
| 1 | 1 |
| 2 | 126 |
| 3 | 1421 |
| 4 | 11024 |
| 5 | 131044 |
| 6 | 1580681 |
| 7 | 16899640 |
| 8 | 184447765 |
| 9 | 2071914854 |
| 10 | 22993996808 |
| 11 | 253857329257 |
| 12 | 2815072088290 |
| 13 | 31231596904276 |
| 14 | 346040351074271 |
| 15 | 3834662231710946 |
| 16 | 42507894984837013 |
| 17 | 471153783855939918 |