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 | 239 |
| 2 | 9503 |
| 3 | 119367 |
| 4 | 850875 |
| 5 | 4542734 |
| 6 | 20568693 |
| 7 | 83124099 |
| 8 | 306179180 |
| 9 | 1038489172 |
| 10 | 3266157979 |
| 11 | 9583669559 |
| 12 | 26387428383 |
| 13 | 68551067596 |
| 14 | 168889679757 |
| 15 | 396460357949 |
| 16 | 890533215416 |
| 17 | 1921389717480 |
| 18 | 3995624313351 |
| 19 | 8033215042947 |
| 20 | 15657425192703 |
| 21 | 29658055171558 |
| 22 | 54715516508103 |