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 | 0 |
| 2 | 34 |
| 3 | 14 |
| 4 | 201 |
| 5 | 666 |
| 6 | 3569 |
| 7 | 15163 |
| 8 | 77576 |
| 9 | 375845 |
| 10 | 1886321 |
| 11 | 9434661 |
| 12 | 47480566 |
| 13 | 237250519 |
| 14 | 1191569971 |
| 15 | 5975706525 |
| 16 | 29984756274 |
| 17 | 150481729037 |
| 18 | 755439602693 |
| 19 | 3791563019201 |
| 20 | 19033524132770 |
| 21 | 95544814021035 |
| 22 | 479625376201987 |