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 | 21 |
| 2 | 514 |
| 3 | 4029 |
| 4 | 18646 |
| 5 | 62853 |
| 6 | 172610 |
| 7 | 409199 |
| 8 | 870122 |
| 9 | 1699831 |
| 10 | 3104474 |
| 11 | 5365417 |
| 12 | 8858142 |
| 13 | 14068115 |
| 14 | 21614144 |
| 15 | 32266607 |
| 16 | 46975088 |
| 17 | 66888951 |
| 18 | 93389664 |
| 19 | 128113109 |
| 20 | 172986976 |
| 21 | 230254897 |
| 22 | 302518564 |
| 23 | 392763779 |
| 24 | 504407780 |
| 25 | 641326401 |
| 26 | 807907094 |