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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 4 |
| 9 | 7 |
| 10 | 18 |
| 11 | 31 |
| 12 | 70 |
| 13 | 126 |
| 14 | 261 |
| 15 | 484 |
| 16 | 960 |
| 17 | 1800 |
| 18 | 3515 |
| 19 | 6643 |
| 20 | 12852 |
| 21 | 24458 |
| 22 | 47151 |
| 23 | 90157 |
| 24 | 173744 |
| 25 | 333498 |
| 26 | 643230 |
| 27 | 1238671 |
| 28 | 2392650 |
| 29 | 4620006 |
| 30 | 8939676 |
| 31 | 17302033 |
| 32 | 33538048 |
| 33 | 65042526 |
| 34 | 126289800 |
| 35 | 245361172 |