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 | 4 |
| 2 | 51 |
| 3 | 1126 |
| 4 | 37201 |
| 5 | 1670136 |
| 6 | 96502339 |
| 7 | 6900041506 |
| 8 | 593717817921 |
| 9 | 60163621650316 |
| 10 | 7059439676098291 |
| 11 | 946047724677141054 |
| 12 | 143165355635117094481 |
| 13 | 24232437980331557100736 |
| 14 | 4550485215254864673978051 |
| 15 | 941387925046160753185319866 |
| 16 | 213240954445118902597065224449 |