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 | 10 |
| 1 | 55 |
| 2 | 385 |
| 3 | 3025 |
| 4 | 25333 |
| 5 | 220825 |
| 6 | 1978405 |
| 7 | 18080425 |
| 8 | 167731333 |
| 9 | 1574304985 |
| 10 | 14914341925 |
| 11 | 142364319625 |
| 12 | 1367428536133 |
| 13 | 13202860761145 |
| 14 | 128037802953445 |
| 15 | 1246324856379625 |
| 16 | 12170706132009733 |
| 17 | 119179318935377305 |
| 18 | 1169842891165484965 |
| 19 | 11506994510201252425 |