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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 7 |
| 7 | 22 |
| 8 | 57 |
| 9 | 132 |
| 10 | 308 |
| 11 | 793 |
| 12 | 2223 |
| 13 | 6328 |
| 14 | 17578 |
| 15 | 47804 |
| 16 | 130169 |
| 17 | 360924 |
| 18 | 1019084 |
| 19 | 2900484 |
| 20 | 8252860 |
| 21 | 23445510 |
| 22 | 66717135 |
| 23 | 190750110 |
| 24 | 548178735 |
| 25 | 1580970612 |
| 26 | 4568275692 |
| 27 | 13217653582 |
| 28 | 38306172442 |
| 29 | 111248832992 |
| 30 | 323794993924 |
| 31 | 944208641464 |
| 32 | 2757606964409 |