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 | 1 |
| 2 | 10 |
| 3 | 65 |
| 4 | 2483 |
| 5 | 7777 |
| 6 | 2990810 |
| 7 | 2097153 |
| 8 | 2568661988 |
| 9 | 10604761518 |
| 10 | 3570527751850 |
| 11 | 743008370689 |
| 12 | 232227195048256531 |
| 13 | 793714773254145 |
| 14 | 21035724521219881850 |
| 15 | 504857283427304833025 |
| 16 | 727429690188773950335429 |
| 17 | 2185911559738696531969 |
| 18 | 43567528891100073055151954340 |
| 19 | 5242880000000000000000001 |