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 | 1 |
| 1 | 14 |
| 2 | 196 |
| 3 | 2744 |
| 4 | 38416 |
| 5 | 537824 |
| 6 | 7529536 |
| 7 | 105413504 |
| 8 | 1475789056 |
| 9 | 20661046784 |
| 10 | 289254654976 |
| 11 | 4049565169664 |
| 12 | 56693912375296 |
| 13 | 793714773254144 |
| 14 | 11112006825558016 |
| 15 | 155568095557812224 |
| 16 | 2177953337809371136 |
| 17 | 30491346729331195904 |
| 18 | 426878854210636742656 |
| 19 | 5976303958948914397184 |
| 20 | 83668255425284801560576 |