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) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 156 |
| 3 | 1036 |
| 4 | 6932 |
| 5 | 46592 |
| 6 | 314068 |
| 7 | 2121404 |
| 8 | 14350760 |
| 9 | 97189500 |
| 10 | 658783572 |
| 11 | 4468484736 |
| 12 | 30325445672 |
| 13 | 205889162656 |
| 14 | 1398299571460 |
| 15 | 9498979946468 |
| 16 | 64541625486340 |
| 17 | 438601729211104 |
| 18 | 2980942930020288 |
| 19 | 20261817487044168 |