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 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 71 |
| 4 | 886 |
| 5 | 12673 |
| 6 | 230456 |
| 7 | 4633919 |
| 8 | 111429982 |
| 9 | 3343015913 |
| 10 | 106868339918 |
| 11 | 4054408822031 |
| 12 | 169941130770676 |
| 13 | 7459593754902673 |
| 14 | 357142287146260646 |
| 15 | 19235986110046059943 |
| 16 | 1151217759731312559002 |
| 17 | 71185663518687172418657 |