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 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 32 |
| 5 | 92 |
| 6 | 265 |
| 7 | 763 |
| 8 | 2197 |
| 9 | 6326 |
| 10 | 18215 |
| 11 | 52448 |
| 12 | 151018 |
| 13 | 434839 |
| 14 | 1252069 |
| 15 | 3605189 |
| 16 | 10380728 |
| 17 | 29890115 |
| 18 | 86065156 |
| 19 | 247814740 |
| 20 | 713554105 |
| 21 | 2054597159 |
| 22 | 5915976737 |
| 23 | 17034376106 |
| 24 | 49048531159 |
| 25 | 141229616740 |
| 26 | 406654474114 |