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 | 62 |
| 3 | 203 |
| 4 | 12622 |
| 5 | 1587497 |
| 6 | 1868619823 |
| 7 | 90661877021812382699758 |
| 8 | 1538984096138042194598749 |
| 9 | 176790247727720247287001192437 |
| 10 | 2726402749746956241622994522641 |
| 11 | 186786483736027016457092821075933 |
| 12 | 273198997240107723863576578753631 |
| 13 | 32049985148080783062944679479294696996434 |