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 | 5 |
| 2 | 37 |
| 3 | 313 |
| 4 | 1253 |
| 5 | 4977 |
| 6 | 11253 |
| 7 | 31393 |
| 8 | 61409 |
| 9 | 125525 |
| 10 | 212785 |
| 11 | 407757 |
| 12 | 609361 |
| 13 | 1059497 |
| 14 | 1541005 |
| 15 | 2328621 |
| 16 | 3282329 |
| 17 | 5006113 |
| 18 | 6538721 |
| 19 | 9545621 |
| 20 | 12352197 |