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 | 8 |
| 2 | 64 |
| 3 | 512 |
| 4 | 3312 |
| 5 | 17088 |
| 6 | 84288 |
| 7 | 410828 |
| 8 | 2037214 |
| 9 | 10282648 |
| 10 | 52493640 |
| 11 | 269103944 |
| 12 | 1379300658 |
| 13 | 7060313768 |
| 14 | 36093818956 |
| 15 | 184394586102 |
| 16 | 941828553348 |
| 17 | 4810728325582 |
| 18 | 24575097951832 |
| 19 | 125549549795310 |
| 20 | 641435496947444 |