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 | 1 |
| 2 | 19 |
| 3 | 583 |
| 4 | 132809 |
| 5 | 46840699 |
| 6 | 4068990560161 |
| 7 | 1204567303451311 |
| 8 | 4146897304424408411 |
| 9 | 18814360006695807527868793 |
| 10 | 21431473463327429953796293981397 |
| 11 | 911368783375270623395381542054690099 |
| 12 | 3805483535214088799368825731508632105336401423 |