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 | 30 |
| 2 | 441 |
| 3 | 4431 |
| 4 | 35094 |
| 5 | 235053 |
| 6 | 1386027 |
| 7 | 7384578 |
| 8 | 36192519 |
| 9 | 165311094 |
| 10 | 710631279 |
| 11 | 2897149824 |
| 12 | 11270295093 |
| 13 | 42043460145 |
| 14 | 151025654781 |
| 15 | 524199355128 |
| 16 | 1763256696537 |
| 17 | 5762466306432 |
| 18 | 18337081016448 |
| 19 | 56926806819666 |