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 | 8 |
| 2 | 41 |
| 3 | 856 |
| 4 | 23147 |
| 5 | 254512 |
| 6 | 3309041 |
| 7 | 29780368 |
| 8 | 168757087 |
| 9 | 28857376792 |
| 10 | 259716622073 |
| 11 | 5973480691064 |
| 12 | 89602217802389 |
| 13 | 7257779456082784 |
| 14 | 210475605899597261 |
| 15 | 6524743766713282016 |
| 16 | 19574231315333822573 |
| 17 | 6524743770186190936 |
| 18 | 2172739675639135323463 |
| 19 | 19554657080276529569192 |