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 | 1 |
| 1 | 3 |
| 2 | 13 |
| 3 | 87 |
| 4 | 1053 |
| 5 | 28576 |
| 6 | 2141733 |
| 7 | 508147108 |
| 8 | 402135275365 |
| 9 | 1073376057490373 |
| 10 | 9700385489355970183 |
| 11 | 298434346895322960005291 |
| 12 | 31479360095907908092817694945 |
| 13 | 11474377948948020660089085281068730 |
| 14 | 14568098446466140788730090352230460100956 |