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 | 43046721 |
| 1 | 16983563041 |
| 2 | 500246412961 |
| 3 | 5352009260481 |
| 4 | 33232930569601 |
| 5 | 146830437604321 |
| 6 | 513798374428641 |
| 7 | 1517108809906561 |
| 8 | 3936588805702081 |
| 9 | 9227446944279201 |
| 10 | 19925626416901921 |
| 11 | 40213853471634241 |
| 12 | 76686282021340161 |