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 | 8 |
| 3 | 32 |
| 4 | 112 |
| 5 | 352 |
| 6 | 1024 |
| 7 | 2816 |
| 8 | 7424 |
| 9 | 18944 |
| 10 | 47104 |
| 11 | 114688 |
| 12 | 274432 |
| 13 | 647168 |
| 14 | 1507328 |
| 15 | 3473408 |
| 16 | 7929856 |
| 17 | 17956864 |
| 18 | 40370176 |
| 19 | 90177536 |
| 20 | 200278016 |
| 21 | 442499072 |
| 22 | 973078528 |
| 23 | 2130706432 |
| 24 | 4647288832 |
| 25 | 10099884032 |
| 26 | 21877489664 |
| 27 | 47244640256 |
| 28 | 101737037824 |
| 29 | 218506461184 |