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 | 3 |
| 2 | 19 |
| 3 | 195 |
| 4 | 2751 |
| 5 | 49413 |
| 6 | 1079079 |
| 7 | 27760323 |
| 8 | 822299383 |
| 9 | 27565191753 |
| 10 | 1031671508495 |
| 11 | 42643092165765 |
| 12 | 1929325374428791 |
| 13 | 94835735736471369 |
| 14 | 5032700868665421519 |
| 15 | 286770182910733076163 |
| 16 | 17463186681730290301671 |