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 | 8 |
| 2 | 10864 |
| 3 | 235416 |
| 4 | 1905632 |
| 5 | 9409960 |
| 6 | 34356048 |
| 7 | 102213944 |
| 8 | 262184896 |
| 9 | 600940872 |
| 10 | 1260879920 |
| 11 | 2463542488 |
| 12 | 4538833824 |
| 13 | 7960697576 |
| 14 | 13389885712 |
| 15 | 21724469880 |
| 16 | 34158739328 |
| 17 | 52251130504 |
| 18 | 78001833456 |
| 19 | 113940720152 |
| 20 | 163226239840 |
| 21 | 229755926568 |
| 22 | 318289163984 |
| 23 | 434582852536 |