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 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 8 |
| 6 | 21 |
| 7 | 31 |
| 8 | 70 |
| 9 | 165 |
| 10 | 286 |
| 11 | 615 |
| 12 | 1351 |
| 13 | 2548 |
| 14 | 5353 |
| 15 | 11343 |
| 16 | 22320 |
| 17 | 46349 |
| 18 | 96516 |
| 19 | 193944 |
| 20 | 400313 |
| 21 | 826747 |
| 22 | 1678540 |
| 23 | 3453642 |
| 24 | 7105102 |
| 25 | 14498569 |
| 26 | 29781633 |
| 27 | 61158957 |
| 28 | 125108639 |
| 29 | 256763850 |
| 30 | 526846289 |
| 31 | 1079030715 |
| 32 | 2213527089 |
| 33 | 4540131569 |
| 34 | 9304062828 |