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 | 129 |
| 4 | 2188 |
| 5 | 18700 |
| 6 | 94638 |
| 7 | 376761 |
| 8 | 1183920 |
| 9 | 3297456 |
| 10 | 8002300 |
| 11 | 18080425 |
| 12 | 37287660 |
| 13 | 73399404 |
| 14 | 135324378 |
| 15 | 241561425 |
| 16 | 410323648 |
| 17 | 680856256 |
| 18 | 1086411960 |
| 19 | 1703414961 |
| 20 | 2587286700 |
| 21 | 3877286700 |
| 22 | 5658888070 |
| 23 | 8172733129 |
| 24 | 11541726768 |
| 25 | 16164030000 |
| 26 | 22204797108 |