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 | 2 |
| 3 | 2 |
| 4 | 5 |
| 5 | 6 |
| 6 | 15 |
| 7 | 24 |
| 8 | 51 |
| 9 | 90 |
| 10 | 187 |
| 11 | 352 |
| 12 | 715 |
| 13 | 1386 |
| 14 | 2795 |
| 15 | 5504 |
| 16 | 11051 |
| 17 | 21930 |
| 18 | 43947 |
| 19 | 87552 |
| 20 | 175275 |
| 21 | 349866 |
| 22 | 700075 |
| 23 | 1398784 |
| 24 | 2798251 |
| 25 | 5593770 |
| 26 | 11188907 |
| 27 | 22372352 |
| 28 | 44747435 |
| 29 | 89483946 |
| 30 | 178973355 |
| 31 | 357924864 |
| 32 | 715860651 |
| 33 | 1431677610 |
| 34 | 2863377067 |
| 35 | 5726666752 |
| 36 | 11453377195 |