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) |
|---|---|
| 3 | 24 |
| 4 | 232 |
| 5 | 2136 |
| 6 | 19282 |
| 7 | 172316 |
| 8 | 1531362 |
| 9 | 13566288 |
| 10 | 119972214 |
| 11 | 1059985776 |
| 12 | 9361450868 |
| 13 | 82670528056 |
| 14 | 730149455646 |
| 15 | 6450340708168 |
| 16 | 57003101680376 |
| 17 | 503941824270112 |
| 18 | 4456975487538614 |
| 19 | 39435161261004840 |
| 20 | 349069538338480040 |
| 21 | 3091176867811031656 |
| 22 | 27385210981926235494 |