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 | 55 |
| 2 | 883 |
| 3 | 6085 |
| 4 | 26461 |
| 5 | 86491 |
| 6 | 232975 |
| 7 | 545833 |
| 8 | 1151065 |
| 9 | 2235871 |
| 10 | 4065931 |
| 11 | 7004845 |
| 12 | 11535733 |
| 13 | 18284995 |
| 14 | 28048231 |
| 15 | 41818321 |
| 16 | 60815665 |
| 17 | 86520583 |
| 18 | 120707875 |
| 19 | 165483541 |
| 20 | 223323661 |
| 21 | 297115435 |