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 | 926 |
| 3 | 37130 |
| 4 | 2973350 |
| 5 | 174174002 |
| 6 | 11582386286 |
| 7 | 729520967450 |
| 8 | 47006639297270 |
| 9 | 2999857885752002 |
| 10 | 192222214478506046 |
| 11 | 12295976362284182570 |
| 12 | 787111112023373201990 |
| 13 | 50370558298891875954002 |
| 14 | 3223838658635388303336206 |
| 15 | 206322355109994528871954490 |