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 | 2 |
| 1 | 7 |
| 2 | 37 |
| 3 | 223 |
| 4 | 1297 |
| 5 | 7789 |
| 6 | 46663 |
| 7 | 279941 |
| 8 | 1679627 |
| 9 | 10077721 |
| 10 | 60466181 |
| 11 | 362797091 |
| 12 | 2176782371 |
| 13 | 13060694051 |
| 14 | 78364164101 |
| 15 | 470184984667 |
| 16 | 2821109907503 |
| 17 | 16926659444771 |
| 18 | 101559956668421 |
| 19 | 609359740010513 |
| 20 | 3656158440062987 |
| 21 | 21936950640377863 |
| 22 | 131621703842267239 |