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 | 19 |
| 2 | 1047 |
| 3 | 64373 |
| 4 | 4481640 |
| 5 | 340900331 |
| 6 | 27436000061 |
| 7 | 2292176360707 |
| 8 | 196818634871899 |
| 9 | 17246903703574357 |
| 10 | 1534951275195670059 |
| 11 | 138293592048140425181 |
| 12 | 12583738258227621100170 |
| 13 | 1154435823206834353336284 |
| 14 | 106638384745041347295504523 |