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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 181 |
| 3 | 3787 |
| 4 | 32768 |
| 5 | 174692 |
| 6 | 685700 |
| 7 | 2178889 |
| 8 | 5931641 |
| 9 | 14348907 |
| 10 | 31622776 |
| 11 | 64631634 |
| 12 | 124125023 |
| 13 | 226242995 |
| 14 | 394421215 |
| 15 | 661735513 |
| 16 | 1073741824 |
| 17 | 1691869691 |
| 18 | 2597429617 |
| 19 | 3896296578 |
| 20 | 5724334022 |
| 21 | 8253624572 |
| 22 | 11699575548 |
| 23 | 16328969210 |