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 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 7 |
| 7 | 10 |
| 8 | 29 |
| 9 | 52 |
| 10 | 142 |
| 11 | 294 |
| 12 | 772 |
| 13 | 1732 |
| 14 | 4451 |
| 15 | 10482 |
| 16 | 26715 |
| 17 | 64908 |
| 18 | 165194 |
| 19 | 409720 |
| 20 | 1044629 |
| 21 | 2627712 |
| 22 | 6721492 |
| 23 | 17079076 |
| 24 | 43853111 |
| 25 | 112273270 |
| 26 | 289390434 |
| 27 | 745262022 |
| 28 | 1928015211 |
| 29 | 4988699442 |
| 30 | 12949776427 |
| 31 | 33638741110 |
| 32 | 87590340673 |