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 | 8 |
| 2 | 28 |
| 3 | 80 |
| 4 | 208 |
| 5 | 512 |
| 6 | 1216 |
| 7 | 2816 |
| 8 | 6400 |
| 9 | 14336 |
| 10 | 31744 |
| 11 | 69632 |
| 12 | 151552 |
| 13 | 327680 |
| 14 | 704512 |
| 15 | 1507328 |
| 16 | 3211264 |
| 17 | 6815744 |
| 18 | 14417920 |
| 19 | 30408704 |
| 20 | 63963136 |
| 21 | 134217728 |
| 22 | 281018368 |
| 23 | 587202560 |
| 24 | 1224736768 |
| 25 | 2550136832 |
| 26 | 5301600256 |
| 27 | 11005853696 |
| 28 | 22817013760 |