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 | 7 |
| 2 | 77 |
| 3 | 1015 |
| 4 | 14763 |
| 5 | 228459 |
| 6 | 3689595 |
| 7 | 61474519 |
| 8 | 1048927880 |
| 9 | 18236463245 |
| 10 | 321899509386 |
| 11 | 5753527081211 |
| 12 | 103922382296180 |
| 13 | 1893943017506925 |
| 14 | 34783258504651434 |
| 15 | 643111366544129175 |
| 16 | 11960812088346090200 |
| 17 | 223614812152492437432 |
| 18 | 4200107505573406222425 |