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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 63 |
| 7 | 126 |
| 8 | 252 |
| 9 | 504 |
| 10 | 1008 |
| 11 | 2016 |
| 12 | 4032 |
| 13 | 8001 |
| 14 | 16002 |
| 15 | 32004 |
| 16 | 63000 |
| 17 | 126000 |
| 18 | 252000 |
| 19 | 504000 |
| 20 | 1008000 |
| 21 | 2016000 |
| 22 | 4032000 |
| 23 | 8001000 |
| 24 | 16002000 |
| 25 | 32004000 |
| 26 | 63000000 |
| 27 | 126000000 |
| 28 | 252000000 |
| 29 | 504000000 |
| 30 | 1008000000 |
| 31 | 2016000000 |