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 | 2 |
| 2 | 11 |
| 3 | 84 |
| 4 | 857 |
| 5 | 10984 |
| 6 | 169803 |
| 7 | 3076688 |
| 8 | 63968273 |
| 9 | 1501465248 |
| 10 | 39277112843 |
| 11 | 1133193163840 |
| 12 | 35748951528681 |
| 13 | 1224258310112384 |
| 14 | 45233097633685643 |
| 15 | 1793524939926112512 |
| 16 | 75966131556225961121 |
| 17 | 3423203234058532082176 |