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) |
|---|---|
| 1 | 2 |
| 2 | 12 |
| 3 | 48 |
| 4 | 960 |
| 5 | 3072 |
| 6 | 61440 |
| 7 | 196608 |
| 8 | 3932160 |
| 9 | 264241152 |
| 10 | 805306368 |
| 11 | 67645734912 |
| 12 | 1030792151040 |
| 13 | 3298534883328 |
| 14 | 65970697666560 |
| 15 | 4433230883192832 |
| 16 | 283726776524341248 |
| 17 | 864691128455135232 |
| 18 | 72634054790231359488 |
| 19 | 1106804644422573096960 |
| 20 | 3541774862152233910272 |
| 21 | 297509088420787648462848 |