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 | 2 |
| 4 | 12 |
| 5 | 40 |
| 6 | 122 |
| 7 | 319 |
| 8 | 722 |
| 9 | 1503 |
| 10 | 2872 |
| 11 | 5159 |
| 12 | 9087 |
| 13 | 15030 |
| 14 | 24441 |
| 15 | 38349 |
| 16 | 58701 |
| 17 | 86682 |
| 18 | 127439 |
| 19 | 180934 |
| 20 | 255292 |
| 21 | 354781 |
| 22 | 484863 |
| 23 | 649910 |
| 24 | 870659 |
| 25 | 1146208 |
| 26 | 1495708 |
| 27 | 1935479 |
| 28 | 2485685 |
| 29 | 3146345 |
| 30 | 3979502 |
| 31 | 4964688 |
| 32 | 6177498 |
| 33 | 7637218 |
| 34 | 9375304 |