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 | 3 |
| 2 | 61 |
| 3 | 37 |
| 4 | 7321 |
| 5 | 13421 |
| 6 | 1117 |
| 7 | 1623931 |
| 8 | 6304673 |
| 9 | 590077 |
| 10 | 212601841 |
| 11 | 58367 |
| 12 | 20113 |
| 13 | 59583967 |
| 14 | 55527473 |
| 15 | 7537711 |
| 16 | 447600088289 |
| 17 | 2218331 |
| 18 | 3138426605161 |
| 19 | 1390636259 |
| 20 | 1120648576818041 |
| 21 | 3421169496361 |
| 22 | 2649263870814793 |