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 | 1 |
| 2 | 11 |
| 3 | 58 |
| 4 | 106 |
| 5 | 671 |
| 6 | 1041 |
| 7 | 10058 |
| 8 | 22598 |
| 9 | 145981 |
| 10 | 480765 |
| 11 | 2359231 |
| 12 | 10297461 |
| 13 | 4836178 |
| 14 | 100395471 |
| 15 | 465933117 |
| 16 | 481182258 |
| 17 | 4810215701 |
| 18 | 16886336471 |
| 19 | 49303833471 |
| 20 | 103791158471 |
| 21 | 223818432208 |
| 22 | 4643311948655 |
| 23 | 4809689791471 |