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 | 1 |
| 2 | 24 |
| 3 | 40 |
| 4 | 384 |
| 5 | 486 |
| 6 | 6144 |
| 7 | 640 |
| 8 | 18688 |
| 9 | 39366 |
| 10 | 91136 |
| 11 | 10240 |
| 12 | 23482368 |
| 13 | 958464 |
| 14 | 52612659 |
| 15 | 163840 |
| 16 | 375717888 |
| 17 | 9568256 |
| 18 | 1502871552 |
| 19 | 2621440 |
| 20 | 353370112 |
| 21 | 186646528 |