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 | 7 |
| 3 | 106 |
| 4 | 3616 |
| 5 | 222190 |
| 6 | 22393101 |
| 7 | 3444274966 |
| 8 | 767013376954 |
| 9 | 237357745294502 |
| 10 | 98772845166962126 |
| 11 | 53805754052806007528 |
| 12 | 37518059561068661124848 |
| 13 | 32857132982034738756201764 |
| 14 | 35557273023840891076852950650 |
| 15 | 46882317669656858737974124606500 |
| 16 | 74388988137861405036759725929161668 |