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) |
|---|---|
| 2 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 32 |
| 6 | 45 |
| 7 | 236 |
| 8 | 330 |
| 9 | 1108 |
| 10 | 2157 |
| 11 | 12740 |
| 12 | 7713 |
| 13 | 93710 |
| 14 | 65602 |
| 15 | 230342 |
| 16 | 570128 |
| 17 | 5007682 |
| 18 | 2484863 |
| 19 | 36896861 |
| 20 | 16618196 |
| 21 | 81481351 |
| 22 | 266303823 |
| 23 | 1991227852 |
| 24 | 533069755 |
| 25 | 7599786619 |
| 26 | 13636829615 |
| 27 | 35633175288 |
| 28 | 43994413188 |
| 29 | 796513902354 |
| 30 | 121485971111 |
| 31 | 5858898939564 |