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 | 121 |
| 3 | 2161 |
| 4 | 107080 |
| 5 | 3774889 |
| 6 | 157346785 |
| 7 | 6156828073 |
| 8 | 248034953713 |
| 9 | 9875814290816 |
| 10 | 395270625350249 |
| 11 | 15786227589947721 |
| 12 | 631059374453758801 |
| 13 | 25216827894687641369 |
| 14 | 1007823833701936877224 |
| 15 | 40276106049134557246481 |