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 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 16 |
| 5 | 48 |
| 6 | 144 |
| 7 | 352 |
| 8 | 896 |
| 9 | 2432 |
| 10 | 7168 |
| 11 | 16896 |
| 12 | 46080 |
| 13 | 114688 |
| 14 | 303104 |
| 15 | 843776 |
| 16 | 2080768 |
| 17 | 5308416 |
| 18 | 13762560 |
| 19 | 34865152 |
| 20 | 87818240 |
| 21 | 241172480 |
| 22 | 583008256 |
| 23 | 1503657984 |
| 24 | 3762290688 |
| 25 | 9604956160 |
| 26 | 23689428992 |
| 27 | 60532195328 |
| 28 | 156397207552 |
| 29 | 385137770496 |
| 30 | 967978254336 |