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) |
|---|---|
| 1 | 3 |
| 2 | 11 |
| 3 | 36 |
| 4 | 363 |
| 5 | 1095 |
| 6 | 3640 |
| 7 | 72396 |
| 8 | 2097628 |
| 9 | 1119484011 |
| 10 | 11489670148 |
| 11 | 200329741476 |
| 12 | 666663663636 |
| 13 | 6666633636651 |
| 14 | 11508483829424 |
| 15 | 203306006810436 |