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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 29 |
| 6 | 408 |
| 7 | 33461 |
| 8 | 38613965 |
| 9 | 3654502875938 |
| 10 | 399133058537705128729 |
| 11 | 4125636888562548868221559797461449 |
| 12 | 4657508918199804645965719872781284840798220312648198320 |