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 | 316 |
| 4 | 1404 |
| 5 | 6768 |
| 6 | 33893 |
| 7 | 167473 |
| 8 | 818962 |
| 9 | 4010648 |
| 10 | 19690604 |
| 11 | 96675456 |
| 12 | 474386856 |
| 13 | 2327622672 |
| 14 | 11421964786 |
| 15 | 56051074387 |
| 16 | 275054292017 |
| 17 | 1349734580410 |
| 18 | 6623378938847 |
| 19 | 32502145147429 |
| 20 | 159493994166901 |
| 21 | 782665804236299 |