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) |
|---|---|
| 10 | 1 |
| 11 | 11 |
| 12 | 66 |
| 13 | 286 |
| 14 | 1001 |
| 15 | 3003 |
| 16 | 8008 |
| 17 | 19448 |
| 18 | 43758 |
| 19 | 92378 |
| 20 | 184756 |
| 21 | 352716 |
| 22 | 646646 |
| 23 | 1144066 |
| 24 | 1961256 |
| 25 | 3268760 |
| 26 | 5311735 |
| 27 | 8436285 |
| 28 | 13123110 |
| 29 | 20030010 |
| 30 | 30045015 |
| 31 | 44352165 |
| 32 | 64512240 |
| 33 | 92561040 |
| 34 | 131128140 |
| 35 | 183579396 |
| 36 | 254186856 |
| 37 | 348330136 |
| 38 | 472733756 |
| 39 | 635745396 |