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 | 2 |
| 1 | 2 |
| 2 | 11 |
| 3 | 182 |
| 4 | 2621 |
| 5 | 33572 |
| 6 | 402131 |
| 7 | 4619162 |
| 8 | 51572441 |
| 9 | 564151952 |
| 10 | 6077367551 |
| 11 | 64696307942 |
| 12 | 682266771461 |
| 13 | 7140400943132 |
| 14 | 74263608488171 |
| 15 | 768372476393522 |
| 16 | 7915352287541681 |
| 17 | 81238170587875112 |
| 18 | 831143535290875991 |
| 19 | 8480291817617883902 |
| 20 | 86322626358560955101 |