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 | 655 |
| 3 | 17511 |
| 4 | 1328849 |
| 5 | 65564239 |
| 6 | 3814023955 |
| 7 | 207866584389 |
| 8 | 11621270470141 |
| 9 | 643234164533111 |
| 10 | 35743258143250665 |
| 11 | 1983110281248178907 |
| 12 | 110094091718725808219 |
| 13 | 6110504997318928433203 |
| 14 | 339180718810796793005395 |
| 15 | 18826477870730711026769043 |