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 | 6 |
| 1 | 36 |
| 2 | 186 |
| 3 | 936 |
| 4 | 4686 |
| 5 | 23436 |
| 6 | 117186 |
| 7 | 585936 |
| 8 | 2929686 |
| 9 | 14648436 |
| 10 | 73242186 |
| 11 | 366210936 |
| 12 | 1831054686 |
| 13 | 9155273436 |
| 14 | 45776367186 |
| 15 | 228881835936 |
| 16 | 1144409179686 |
| 17 | 5722045898436 |
| 18 | 28610229492186 |
| 19 | 143051147460936 |
| 20 | 715255737304686 |