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 | 47 |
| 2 | 2162 |
| 3 | 99452 |
| 4 | 4574792 |
| 5 | 210440432 |
| 6 | 9680258791 |
| 7 | 445291854660 |
| 8 | 20483423028045 |
| 9 | 942237354119580 |
| 10 | 43342913451658140 |
| 11 | 1993773796235517600 |
| 12 | 91713584389960162440 |
| 13 | 4218824411042032288125 |
| 14 | 194065901246713684538250 |