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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 67 |
| 7 | 1002 |
| 8 | 8009 |
| 9 | 43759 |
| 10 | 184758 |
| 11 | 646878 |
| 12 | 1971883 |
| 13 | 5541966 |
| 14 | 16231216 |
| 15 | 60090032 |
| 16 | 290305577 |
| 17 | 1523150157 |
| 18 | 7564006759 |
| 19 | 34099637859 |
| 20 | 139541849878 |
| 21 | 526321168143 |
| 22 | 1878476551128 |
| 23 | 6603812572941 |
| 24 | 24052434515891 |
| 25 | 94278969044262 |
| 26 | 396750746960712 |