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 | 12 |
| 2 | 138 |
| 3 | 1542 |
| 4 | 16878 |
| 5 | 181902 |
| 6 | 1937118 |
| 7 | 20434062 |
| 8 | 213906558 |
| 9 | 2225159022 |
| 10 | 23026431198 |
| 11 | 237237880782 |
| 12 | 2435140927038 |
| 13 | 24916268343342 |
| 14 | 254246415090078 |
| 15 | 2588217735810702 |
| 16 | 26293959622296318 |
| 17 | 266645636600666862 |