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 | 16 |
| 2 | 256 |
| 3 | 432 |
| 4 | 2320 |
| 5 | 10144 |
| 6 | 41444 |
| 7 | 185136 |
| 8 | 813824 |
| 9 | 3485460 |
| 10 | 15230748 |
| 11 | 66498048 |
| 12 | 288260144 |
| 13 | 1254699732 |
| 14 | 5464724040 |
| 15 | 23754515904 |
| 16 | 103342176624 |
| 17 | 449732042272 |
| 18 | 1956188201356 |
| 19 | 8510004040560 |
| 20 | 37025612095680 |
| 21 | 161072178927292 |