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 | 0 |
| 5 | 5 |
| 6 | 1 |
| 7 | 20 |
| 8 | 8 |
| 9 | 75 |
| 10 | 44 |
| 11 | 275 |
| 12 | 208 |
| 13 | 1001 |
| 14 | 910 |
| 15 | 3640 |
| 16 | 3808 |
| 17 | 13260 |
| 18 | 15504 |
| 19 | 48450 |
| 20 | 62016 |
| 21 | 177650 |
| 22 | 245157 |
| 23 | 653752 |
| 24 | 961400 |
| 25 | 2414425 |
| 26 | 3749460 |
| 27 | 8947575 |
| 28 | 14567280 |
| 29 | 33266625 |
| 30 | 56448210 |
| 31 | 124062000 |
| 32 | 218349120 |
| 33 | 463991880 |
| 34 | 843621600 |
| 35 | 1739969550 |
| 36 | 3257112960 |