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 | 2 |
| 2 | 2 |
| 3 | 10 |
| 4 | 34 |
| 5 | 166 |
| 6 | 777 |
| 7 | 4053 |
| 8 | 21225 |
| 9 | 114594 |
| 10 | 624242 |
| 11 | 3442399 |
| 12 | 19121661 |
| 13 | 106964679 |
| 14 | 601639326 |
| 15 | 3400619170 |
| 16 | 19301719485 |
| 17 | 109962791254 |