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 | 5 |
| 2 | 37 |
| 3 | 293 |
| 4 | 2341 |
| 5 | 18725 |
| 6 | 149797 |
| 7 | 1198373 |
| 8 | 9586981 |
| 9 | 76695845 |
| 10 | 613566757 |
| 11 | 4908534053 |
| 12 | 39268272421 |
| 13 | 314146179365 |
| 14 | 2513169434917 |
| 15 | 20105355479333 |
| 16 | 160842843834661 |
| 17 | 1286742750677285 |
| 18 | 10293942005418277 |
| 19 | 82351536043346213 |
| 20 | 658812288346769701 |
| 21 | 5270498306774157605 |
| 22 | 42163986454193260837 |