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 | 16 |
| 3 | 192 |
| 4 | 2304 |
| 5 | 27648 |
| 6 | 331776 |
| 7 | 3981312 |
| 8 | 47775744 |
| 9 | 573308928 |
| 10 | 6879707136 |
| 11 | 82556485632 |
| 12 | 990677827584 |
| 13 | 11888133931008 |
| 14 | 142657607172096 |
| 15 | 1711891286065152 |
| 16 | 20542695432781824 |
| 17 | 246512345193381888 |
| 18 | 2958148142320582656 |
| 19 | 35497777707846991872 |
| 20 | 425973332494163902464 |
| 21 | 5111679989929966829568 |