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 | 10 |
| 3 | 1988 |
| 4 | 14697 |
| 5 | 83292 |
| 6 | 1503397 |
| 7 | 18859052 |
| 8 | 93952013 |
| 9 | 89171409882 |
| 10 | 9646383703961 |
| 11 | 209456854921713 |
| 12 | 3950430820867201 |
| 13 | 13113506646374409451778 |