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 | 2 |
| 2 | 11 |
| 3 | 99 |
| 4 | 1066 |
| 5 | 13283 |
| 6 | 190933 |
| 7 | 3117900 |
| 8 | 56729565 |
| 9 | 1132679479 |
| 10 | 24564972756 |
| 11 | 574431351673 |
| 12 | 14394977015245 |
| 13 | 384489778509034 |
| 14 | 10894501505088695 |
| 15 | 326149933663962479 |
| 16 | 10280153573323314858 |