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) |
|---|---|
| 2 | 140450 |
| 3 | 16091936 |
| 4 | 2415542018 |
| 5 | 400448833106 |
| 6 | 69206906601800 |
| 7 | 12190695635108354 |
| 8 | 2167175327735637122 |
| 9 | 387018647188487143424 |
| 10 | 69272289588070930561250 |
| 11 | 12413316310203106546620386 |
| 12 | 2225719417041514241075539592 |
| 13 | 399192630631160441128470998546 |