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 | 1 |
| 2 | 10 |
| 3 | 217 |
| 4 | 8317 |
| 5 | 487630 |
| 6 | 40647178 |
| 7 | 4561368175 |
| 8 | 663134389930 |
| 9 | 121218250616173 |
| 10 | 27212315953140892 |
| 11 | 7359774260167595035 |
| 12 | 2360287411461166320775 |
| 13 | 885627663284464131142801 |
| 14 | 384376149675044501884907410 |
| 15 | 191068288010770323577312291141 |