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 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 0 |
| 4 | 14 |
| 5 | 12 |
| 6 | 42 |
| 7 | 0 |
| 8 | 254 |
| 9 | 252 |
| 10 | 762 |
| 11 | 240 |
| 12 | 3822 |
| 13 | 3276 |
| 14 | 10922 |
| 15 | 0 |
| 16 | 65534 |
| 17 | 65532 |
| 18 | 196602 |
| 19 | 65520 |
| 20 | 983022 |
| 21 | 851916 |
| 22 | 2817962 |
| 23 | 65280 |
| 24 | 16711422 |
| 25 | 16579836 |
| 26 | 50002682 |
| 27 | 15790320 |
| 28 | 250539758 |
| 29 | 214748364 |
| 30 | 715827882 |
| 31 | 0 |
| 32 | 4294967294 |
| 33 | 4294967292 |
| 34 | 12884901882 |
| 35 | 4294967280 |