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 | 0 |
| 2 | 76 |
| 3 | 1200 |
| 4 | 13556 |
| 5 | 349391 |
| 6 | 7907841 |
| 7 | 145801320 |
| 8 | 2739867178 |
| 9 | 54011094032 |
| 10 | 1041910674136 |
| 11 | 19735900374844 |
| 12 | 375966942137013 |
| 13 | 7191151172715700 |
| 14 | 137027122103977880 |
| 15 | 2605652234584032150 |
| 16 | 49595770201824007656 |