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 | 1 |
| 2 | 30 |
| 3 | 235 |
| 4 | 1448 |
| 5 | 7909 |
| 6 | 40674 |
| 7 | 202719 |
| 8 | 994268 |
| 9 | 4837337 |
| 10 | 23441366 |
| 11 | 113377235 |
| 12 | 547864528 |
| 13 | 2646278093 |
| 14 | 12779454410 |
| 15 | 61709221831 |
| 16 | 297968336836 |
| 17 | 1438739595201 |
| 18 | 6946894643134 |
| 19 | 33542671171515 |
| 20 | 161958548471736 |
| 21 | 782005482553269 |
| 22 | 3775857399168946 |
| 23 | 18231454211243951 |
| 24 | 88029252078796716 |