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 | 165 |
| 2 | 825 |
| 3 | 4125 |
| 4 | 19305 |
| 5 | 92697 |
| 6 | 449295 |
| 7 | 2159025 |
| 8 | 10380183 |
| 9 | 50011289 |
| 10 | 240772037 |
| 11 | 1158816022 |
| 12 | 5578909654 |
| 13 | 26858310661 |
| 14 | 129293730680 |
| 15 | 622425498913 |
| 16 | 2996413264570 |
| 17 | 14424866547232 |
| 18 | 69441979827433 |
| 19 | 334297722590641 |