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 | 2 |
| 3 | 5 |
| 4 | 16 |
| 5 | 56 |
| 6 | 216 |
| 7 | 907 |
| 8 | 4096 |
| 9 | 19683 |
| 10 | 100000 |
| 11 | 534146 |
| 12 | 2985984 |
| 13 | 17403307 |
| 14 | 105413504 |
| 15 | 661735514 |
| 16 | 4294967296 |
| 17 | 28761784748 |
| 18 | 198359290368 |
| 19 | 1406563064942 |
| 20 | 10240000000000 |
| 21 | 76436817165460 |
| 22 | 584318301411328 |
| 23 | 4569515072723572 |