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 | 8 |
| 2 | 25 |
| 3 | 119 |
| 4 | 484 |
| 5 | 2117 |
| 6 | 9025 |
| 7 | 38936 |
| 8 | 167281 |
| 9 | 720083 |
| 10 | 3097600 |
| 11 | 13329209 |
| 12 | 57350329 |
| 13 | 246768392 |
| 14 | 1061782225 |
| 15 | 4568619071 |
| 16 | 19657722436 |
| 17 | 84582794333 |
| 18 | 363940725625 |
| 19 | 1565955363224 |
| 20 | 6737954403049 |
| 21 | 28991906279867 |
| 22 | 124745667481600 |