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 | 44 |
| 2 | 232 |
| 3 | 920 |
| 4 | 3876 |
| 5 | 14936 |
| 6 | 60568 |
| 7 | 248240 |
| 8 | 996440 |
| 9 | 3876264 |
| 10 | 15524272 |
| 11 | 63773584 |
| 12 | 255477160 |
| 13 | 993549616 |
| 14 | 3970767760 |
| 15 | 16350559552 |
| 16 | 65386339632 |
| 17 | 254129067336 |
| 18 | 1016476056896 |
| 19 | 4184726043136 |
| 20 | 16740063237448 |
| 21 | 65054466609736 |
| 22 | 260416091191808 |