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) |
|---|---|
| 4 | 1 |
| 5 | 3 |
| 6 | 8 |
| 7 | 21 |
| 8 | 54 |
| 9 | 133 |
| 10 | 309 |
| 11 | 674 |
| 12 | 1383 |
| 13 | 2683 |
| 14 | 4950 |
| 15 | 8735 |
| 16 | 14820 |
| 17 | 24285 |
| 18 | 38587 |
| 19 | 59652 |
| 20 | 89981 |
| 21 | 132771 |
| 22 | 192052 |
| 23 | 272841 |
| 24 | 381314 |
| 25 | 524997 |
| 26 | 712977 |
| 27 | 956134 |
| 28 | 1267395 |
| 29 | 1662011 |
| 30 | 2157858 |
| 31 | 2775763 |
| 32 | 3539856 |
| 33 | 4477949 |
| 34 | 5621943 |
| 35 | 7008264 |
| 36 | 8678329 |
| 37 | 10679043 |
| 38 | 13063328 |
| 39 | 15890685 |