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 | 5 |
| 3 | 93 |
| 4 | 7517 |
| 5 | 2501946 |
| 6 | 3473827027 |
| 7 | 19823918037604 |
| 8 | 466326405037190729 |
| 9 | 45283517791861200639757 |
| 10 | 18137923612752525595542410804 |
| 11 | 29967243098804386765778629249653298 |
| 12 | 204247259656641635611144023845458294818885 |