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 | 10 |
| 2 | 64 |
| 3 | 406 |
| 4 | 2656 |
| 5 | 17830 |
| 6 | 121744 |
| 7 | 839926 |
| 8 | 5830336 |
| 9 | 40615750 |
| 10 | 283523824 |
| 11 | 1981521046 |
| 12 | 13858064416 |
| 13 | 96956119270 |
| 14 | 678491508304 |
| 15 | 4748635251766 |
| 16 | 33237225536896 |
| 17 | 232647693856390 |
| 18 | 1628482317387184 |
| 19 | 11399170063280086 |