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 | 128 |
| 2 | 1156 |
| 3 | 38936 |
| 4 | 652864 |
| 5 | 15786848 |
| 6 | 315701824 |
| 7 | 6985036032 |
| 8 | 146719641600 |
| 9 | 3168621039616 |
| 10 | 67463750631424 |
| 11 | 1447364588320768 |
| 12 | 30930859081810944 |
| 13 | 662387735874816000 |
| 14 | 14169961476541661184 |
| 15 | 303300655391773020160 |