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 | 14 |
| 2 | 294 |
| 3 | 4116 |
| 4 | 48020 |
| 5 | 504210 |
| 6 | 4941258 |
| 7 | 46118408 |
| 8 | 415065672 |
| 9 | 3631824630 |
| 10 | 31072277390 |
| 11 | 261007130076 |
| 12 | 2159240803356 |
| 13 | 17633799894074 |
| 14 | 142426845298290 |
| 15 | 1139414762386320 |
| 16 | 9039357114931472 |
| 17 | 71184937280085342 |
| 18 | 556917450485373558 |