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 | 4 |
| 2 | 1314 |
| 3 | 7128 |
| 4 | 3081302 |
| 5 | 4009568 |
| 6 | 5312966 |
| 7 | 16834447856 |
| 8 | 2462344442400 |
| 9 | 289274033242208 |
| 10 | 46671783125431818542 |
| 11 | 221000817555367050608 |
| 12 | 618811172463743796896678 |
| 13 | 13954866972387224169218132 |
| 14 | 176536110349401666017009273532 |
| 15 | 996528450408723697487070591774 |