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 | 16 |
| 2 | 29 |
| 3 | 574 |
| 4 | 2228 |
| 5 | 24109 |
| 6 | 128740 |
| 7 | 1096624 |
| 8 | 6780585 |
| 9 | 51990406 |
| 10 | 344168764 |
| 11 | 2516149353 |
| 12 | 17192729316 |
| 13 | 122982062328 |
| 14 | 852741876277 |
| 15 | 6038989672654 |
| 16 | 42158071124804 |
| 17 | 297183800090933 |
| 18 | 2081125389730084 |
| 19 | 14639300678885312 |