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 | 16 |
| 1 | 72 |
| 2 | 288 |
| 3 | 1200 |
| 4 | 5376 |
| 5 | 25480 |
| 6 | 125504 |
| 7 | 634608 |
| 8 | 3269680 |
| 9 | 17086168 |
| 10 | 90282240 |
| 11 | 481347152 |
| 12 | 2585485504 |
| 13 | 13974825960 |
| 14 | 75941188736 |
| 15 | 414593263952 |
| 16 | 2272626444528 |
| 17 | 12502223573304 |
| 18 | 68996534259040 |
| 19 | 381858968527680 |
| 20 | 2118806030647328 |
| 21 | 11783826597027256 |
| 22 | 65674579024955904 |