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) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 51 |
| 3 | 561 |
| 4 | 7726 |
| 5 | 129406 |
| 6 | 2572892 |
| 7 | 59525136 |
| 8 | 1576414408 |
| 9 | 47144606666 |
| 10 | 1574176301192 |
| 11 | 58126182666796 |
| 12 | 2354183194432226 |
| 13 | 103850488571214174 |
| 14 | 4959424774062415780 |
| 15 | 255032863135423053615 |
| 16 | 14056171975717324065788 |