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 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 6 |
| 10 | 57 |
| 11 | 247 |
| 12 | 718 |
| 13 | 1795 |
| 14 | 4210 |
| 15 | 9969 |
| 16 | 27596 |
| 17 | 98507 |
| 18 | 402924 |
| 19 | 1626525 |
| 20 | 6142611 |
| 21 | 21729644 |
| 22 | 73308577 |
| 23 | 241270869 |
| 24 | 793679894 |
| 25 | 2666563900 |
| 26 | 9263663359 |
| 27 | 33259282181 |
| 28 | 122178034000 |
| 29 | 453573262015 |
| 30 | 1685632454779 |
| 31 | 6240174176549 |
| 32 | 22987207140830 |