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 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 96 |
| 7 | 192 |
| 8 | 384 |
| 9 | 768 |
| 10 | 1536 |
| 11 | 3072 |
| 12 | 6144 |
| 13 | 12288 |
| 14 | 24576 |
| 15 | 49152 |
| 16 | 98301 |
| 17 | 196596 |
| 18 | 393183 |
| 19 | 786348 |
| 20 | 1572660 |
| 21 | 3145248 |
| 22 | 6290352 |
| 23 | 12580416 |
| 24 | 25160256 |
| 25 | 50319360 |
| 26 | 100636416 |
| 27 | 201268224 |
| 28 | 402527232 |
| 29 | 805036032 |
| 30 | 1610035200 |
| 31 | 3219996672 |