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 | 0 |
| 2 | 3 |
| 3 | 107 |
| 4 | 4951 |
| 5 | 39916141 |
| 6 | 6227015357 |
| 7 | 355687428046967 |
| 8 | 121645100408347963 |
| 9 | 25852016738884971417571 |
| 10 | 8841761993739701954543554805353 |
| 11 | 8222838654177922817725562105174617 |