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 | 28 |
| 3 | 256 |
| 4 | 2853 |
| 5 | 30283 |
| 6 | 321815 |
| 7 | 3414588 |
| 8 | 36212912 |
| 9 | 383990913 |
| 10 | 4071436782 |
| 11 | 43168209556 |
| 12 | 457694879893 |
| 13 | 4852734814404 |
| 14 | 51451313282657 |
| 15 | 545514314383676 |
| 16 | 5783833141059232 |
| 17 | 61323273361025444 |
| 18 | 650181923557415105 |