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 | 168 |
| 2 | 712 |
| 3 | 2368 |
| 4 | 8840 |
| 5 | 31176 |
| 6 | 113024 |
| 7 | 404264 |
| 8 | 1455496 |
| 9 | 5223552 |
| 10 | 18775816 |
| 11 | 67437448 |
| 12 | 242306240 |
| 13 | 870461352 |
| 14 | 3127322696 |
| 15 | 11235107264 |
| 16 | 40363689352 |
| 17 | 145010699592 |
| 18 | 520968428032 |
| 19 | 1871637364264 |
| 20 | 6724074597128 |
| 21 | 24157004951808 |
| 22 | 86786820122120 |