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 | 1 |
| 2 | 51 |
| 3 | 991 |
| 4 | 32611 |
| 5 | 1084851 |
| 6 | 39612501 |
| 7 | 1509893001 |
| 8 | 59794281891 |
| 9 | 2435292751411 |
| 10 | 101471705778601 |
| 11 | 4307041366439901 |
| 12 | 185658731463324901 |
| 13 | 8107975032968711941 |
| 14 | 358060848206529563811 |
| 15 | 15966070888767791932191 |
| 16 | 717973394997481520889891 |