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 | 12 |
| 2 | 169 |
| 3 | 2378 |
| 4 | 33461 |
| 5 | 470832 |
| 6 | 6625109 |
| 7 | 93222358 |
| 8 | 1311738121 |
| 9 | 18457556052 |
| 10 | 259717522849 |
| 11 | 3654502875938 |
| 12 | 51422757785981 |
| 13 | 723573111879672 |
| 14 | 10181446324101389 |
| 15 | 143263821649299118 |
| 16 | 2015874949414289041 |
| 17 | 28365513113449345692 |
| 18 | 399133058537705128729 |
| 19 | 5616228332641321147898 |