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) |
|---|---|
| 3 | 36 |
| 4 | 0 |
| 5 | 108 |
| 6 | 120 |
| 7 | 444 |
| 8 | 840 |
| 9 | 2124 |
| 10 | 4536 |
| 11 | 10332 |
| 12 | 22440 |
| 13 | 49260 |
| 14 | 106392 |
| 15 | 229500 |
| 16 | 491400 |
| 17 | 1048716 |
| 18 | 2228088 |
| 19 | 4718748 |
| 20 | 9961320 |
| 21 | 20971692 |
| 22 | 44040024 |
| 23 | 92274876 |
| 24 | 192937800 |
| 25 | 402653388 |
| 26 | 838860600 |
| 27 | 1744830684 |
| 28 | 3623878440 |
| 29 | 7516193004 |
| 30 | 15569256216 |
| 31 | 32212254972 |
| 32 | 66571992840 |