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 | 4 |
| 4 | 16 |
| 5 | 48 |
| 6 | 160 |
| 7 | 576 |
| 8 | 4096 |
| 9 | 14336 |
| 10 | 73728 |
| 11 | 327680 |
| 12 | 2985984 |
| 13 | 14929920 |
| 14 | 77635584 |
| 15 | 418037760 |
| 16 | 4294967296 |
| 17 | 21474836480 |
| 18 | 146028888064 |
| 19 | 894426939392 |
| 20 | 10240000000000 |
| 21 | 59392000000000 |
| 22 | 409600000000000 |