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 | 4 |
| 3 | 8 |
| 4 | 32 |
| 5 | 96 |
| 6 | 448 |
| 7 | 2944 |
| 8 | 15104 |
| 9 | 160768 |
| 10 | 1565696 |
| 11 | 16812032 |
| 12 | 341250048 |
| 13 | 5081473024 |
| 14 | 128940408832 |
| 15 | 4153114198016 |
| 16 | 110562817540096 |
| 17 | 6199850375708672 |
| 18 | 294499013825921024 |
| 19 | 17095312584100282368 |
| 20 | 1743063839902067064832 |