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 | 8 |
| 2 | 33 |
| 3 | 150 |
| 4 | 629 |
| 5 | 2790 |
| 6 | 12110 |
| 7 | 52889 |
| 8 | 230406 |
| 9 | 1005170 |
| 10 | 4382278 |
| 11 | 19110183 |
| 12 | 83327912 |
| 13 | 363357551 |
| 14 | 1584416863 |
| 15 | 6908888883 |
| 16 | 30126285845 |
| 17 | 131366174343 |
| 18 | 572824066436 |
| 19 | 2497808102429 |
| 20 | 10891729292407 |
| 21 | 47493549245614 |
| 22 | 207096331298600 |