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 | 1 |
| 2 | 29 |
| 3 | 1177 |
| 4 | 54629 |
| 5 | 2726977 |
| 6 | 142504685 |
| 7 | 7685245225 |
| 8 | 424109499317 |
| 9 | 23818681210961 |
| 10 | 1356315674712509 |
| 11 | 78100982458201017 |
| 12 | 4538960021319997189 |
| 13 | 265837773438037013857 |
| 14 | 15672475449746510425485 |