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) |
|---|---|
| 5 | 1 |
| 6 | 10 |
| 7 | 60 |
| 8 | 275 |
| 9 | 1060 |
| 10 | 3612 |
| 11 | 11210 |
| 12 | 32310 |
| 13 | 87665 |
| 14 | 226130 |
| 15 | 558684 |
| 16 | 1329720 |
| 17 | 3062905 |
| 18 | 6853310 |
| 19 | 14941330 |
| 20 | 31820642 |
| 21 | 66343150 |
| 22 | 135659570 |
| 23 | 272496680 |
| 24 | 538427720 |
| 25 | 1047788137 |
| 26 | 2010303890 |
| 27 | 3806292130 |
| 28 | 7118038360 |
| 29 | 13157217715 |
| 30 | 24055170690 |
| 31 | 43527162380 |
| 32 | 77994164515 |
| 33 | 138463246700 |