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 | 1 |
| 2 | 8 |
| 3 | 21 |
| 4 | 84 |
| 5 | 206 |
| 6 | 717 |
| 7 | 1810 |
| 8 | 5462 |
| 9 | 13859 |
| 10 | 38497 |
| 11 | 96113 |
| 12 | 253206 |
| 13 | 620480 |
| 14 | 1566292 |
| 15 | 3770933 |
| 16 | 9212041 |
| 17 | 21768608 |
| 18 | 51795427 |
| 19 | 120279052 |
| 20 | 279849177 |
| 21 | 639379257 |
| 22 | 1459282932 |
| 23 | 3283758256 |
| 24 | 7369471795 |
| 25 | 16351101855 |
| 26 | 36147590987 |
| 27 | 79162129897 |
| 28 | 172646751524 |
| 29 | 373527250619 |
| 30 | 804631686843 |
| 31 | 1721283389932 |
| 32 | 3666041417241 |