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 | 14 |
| 2 | 136 |
| 3 | 1394 |
| 4 | 14896 |
| 5 | 162074 |
| 6 | 1775656 |
| 7 | 19503554 |
| 8 | 214424416 |
| 9 | 2358209834 |
| 10 | 25938473176 |
| 11 | 285315864914 |
| 12 | 3138445153936 |
| 13 | 34522779252794 |
| 14 | 379750102018696 |
| 15 | 4177249243157474 |
| 16 | 45949734158539456 |
| 17 | 505447045679162954 |
| 18 | 5559917382211708216 |
| 19 | 61159090723292453234 |
| 20 | 672749996032071636976 |