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) |
|---|---|
| 2 | 5 |
| 3 | 29 |
| 4 | 213 |
| 5 | 1633 |
| 6 | 12821 |
| 7 | 102369 |
| 8 | 826305 |
| 9 | 6724933 |
| 10 | 55108961 |
| 11 | 454279229 |
| 12 | 3764205941 |
| 13 | 31334121045 |
| 14 | 261903891425 |
| 15 | 2197181330193 |
| 16 | 18494163039793 |
| 17 | 156140262436597 |
| 18 | 1321876222268977 |
| 19 | 11219183496737037 |
| 20 | 95441562533950341 |
| 21 | 813656964557564557 |
| 22 | 6950294796825730249 |