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 | 1 |
| 3 | 38 |
| 4 | 481 |
| 5 | 3355 |
| 6 | 16120 |
| 7 | 60071 |
| 8 | 186238 |
| 9 | 502386 |
| 10 | 1215435 |
| 11 | 2694340 |
| 12 | 5559191 |
| 13 | 10803013 |
| 14 | 19953466 |
| 15 | 35282365 |
| 16 | 60071660 |
| 17 | 98945236 |
| 18 | 158276613 |
| 19 | 246683346 |
| 20 | 375619645 |
| 21 | 560079455 |
| 22 | 819422956 |
| 23 | 1178340163 |
| 24 | 1667966026 |
| 25 | 2327162150 |
| 26 | 3203980975 |
| 27 | 4357328976 |
| 28 | 5858846163 |