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 | 2 |
| 2 | 3 |
| 3 | 23 |
| 4 | 1967 |
| 5 | 3263 |
| 6 | 5015 |
| 7 | 60455 |
| 8 | 1016507 |
| 9 | 4420163 |
| 10 | 12055511 |
| 11 | 14365607 |
| 12 | 25726727 |
| 13 | 27896423 |
| 14 | 66562307 |
| 15 | 72764735 |
| 16 | 98734967 |
| 17 | 175186655 |
| 18 | 224868311 |
| 19 | 253694927 |
| 20 | 288657203 |
| 21 | 386668343 |
| 22 | 421575407 |
| 23 | 504737747 |
| 24 | 630645455 |
| 25 | 1493547999 |