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) |
|---|---|
| 6 | 20 |
| 7 | 371 |
| 8 | 2588 |
| 9 | 11097 |
| 10 | 35645 |
| 11 | 94457 |
| 12 | 218124 |
| 13 | 454220 |
| 14 | 872648 |
| 15 | 1571715 |
| 16 | 2684936 |
| 17 | 4388567 |
| 18 | 6909867 |
| 19 | 10536089 |
| 20 | 15624200 |
| 21 | 22611330 |
| 22 | 32025950 |
| 23 | 44499779 |
| 24 | 60780420 |
| 25 | 81744725 |
| 26 | 108412889 |
| 27 | 141963273 |
| 28 | 183747956 |
| 29 | 235309016 |
| 30 | 298395540 |