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 | 2 |
| 2 | 2 |
| 3 | 10 |
| 4 | 10 |
| 5 | 22 |
| 6 | 110 |
| 7 | 278 |
| 8 | 238 |
| 9 | 1054 |
| 10 | 1342 |
| 11 | 11066 |
| 12 | 6118 |
| 13 | 18734 |
| 14 | 107030 |
| 15 | 557270 |
| 16 | 163030 |
| 17 | 1440430 |
| 18 | 2195110 |
| 19 | 11016290 |
| 20 | 3641210 |
| 21 | 23250370 |
| 22 | 38188766 |