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 | 57 |
| 2 | 145 |
| 3 | 177 |
| 4 | 1649 |
| 5 | 7073 |
| 6 | 23401 |
| 7 | 131361 |
| 8 | 423393 |
| 9 | 2012174 |
| 10 | 4785713 |
| 11 | 33555057 |
| 12 | 43050817 |
| 13 | 177264449 |
| 14 | 364568617 |
| 15 | 1073792449 |
| 16 | 4486784401 |
| 17 | 13877119009 |
| 18 | 31381070257 |
| 19 | 94143190994 |
| 20 | 125937424601 |
| 21 | 2552470327702 |
| 22 | 8796093024057 |
| 23 | 33233199005057 |
| 24 | 130291290501553 |
| 25 | 1628414210130481 |
| 26 | 1853020188884609 |