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) |
|---|---|
| 8 | 1 |
| 9 | 1 |
| 10 | 5 |
| 11 | 15 |
| 12 | 43 |
| 13 | 99 |
| 14 | 217 |
| 15 | 429 |
| 16 | 810 |
| 17 | 1430 |
| 18 | 2438 |
| 19 | 3978 |
| 20 | 6310 |
| 21 | 9690 |
| 22 | 14550 |
| 23 | 21318 |
| 24 | 30667 |
| 25 | 43263 |
| 26 | 60115 |
| 27 | 82225 |
| 28 | 111041 |
| 29 | 148005 |
| 30 | 195143 |
| 31 | 254475 |
| 32 | 328756 |
| 33 | 420732 |
| 34 | 534076 |
| 35 | 672452 |
| 36 | 840652 |
| 37 | 1043460 |
| 38 | 1287036 |
| 39 | 1577532 |
| 40 | 1922741 |