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 | 2 |
| 1 | 17 |
| 2 | 149 |
| 3 | 1343 |
| 4 | 12401 |
| 5 | 116807 |
| 6 | 1117649 |
| 7 | 10823543 |
| 8 | 105764801 |
| 9 | 1040353607 |
| 10 | 10282475249 |
| 11 | 101977326743 |
| 12 | 1013841287201 |
| 13 | 10096889010407 |
| 14 | 100678223072849 |
| 15 | 1004747561509943 |
| 16 | 10033232930569601 |
| 17 | 100232630513987207 |
| 18 | 1001628413597910449 |
| 19 | 10011398895185373143 |