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 | 1 |
| 2 | 6 |
| 3 | 22 |
| 4 | 174 |
| 5 | 1479 |
| 6 | 16808 |
| 7 | 201834 |
| 8 | 2631594 |
| 9 | 35965555 |
| 10 | 512062566 |
| 11 | 7528425420 |
| 12 | 113708935808 |
| 13 | 1756853846316 |
| 14 | 27676951028496 |
| 15 | 443411345677658 |
| 16 | 7209139541742750 |
| 17 | 118738765611199983 |
| 18 | 1978360119497335826 |