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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 10 |
| 6 | 20 |
| 7 | 35 |
| 8 | 57 |
| 9 | 93 |
| 10 | 165 |
| 11 | 330 |
| 12 | 715 |
| 13 | 1574 |
| 14 | 3381 |
| 15 | 6995 |
| 16 | 13990 |
| 17 | 27370 |
| 18 | 53143 |
| 19 | 103702 |
| 20 | 204820 |
| 21 | 409640 |
| 22 | 826045 |
| 23 | 1669801 |
| 24 | 3368259 |
| 25 | 6765175 |
| 26 | 13530350 |
| 27 | 26985675 |
| 28 | 53774932 |
| 29 | 107232053 |
| 30 | 214146295 |
| 31 | 428292590 |
| 32 | 857417220 |
| 33 | 1717012749 |
| 34 | 3437550076 |