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 | 13421 |
| 2 | 1623931 |
| 3 | 1772893 |
| 4 | 212601841 |
| 5 | 3421169496361 |
| 6 | 195019441 |
| 7 | 50544702849929377 |
| 8 | 3138426605161 |
| 9 | 6115909044841454629 |
| 10 | 9768997162071483134919121 |
| 11 | 5559917315850179173 |
| 12 | 46329453543600481 |
| 13 | 9842332430037465033595921 |