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 | 3 |
| 3 | 49 |
| 4 | 15 |
| 5 | 923521 |
| 6 | 1519 |
| 7 | 88245939632761 |
| 8 | 3913 |
| 9 | 1117249 |
| 10 | 3131659711 |
| 11 | 4345096786921664259621718196367601 |
| 12 | 238483 |
| 13 | 9024585590445680759701490904755712009585829774768244676951841 |
| 14 | 2772760313554466311 |
| 15 | 198528059518891985825881 |
| 16 | 32748812641 |