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 | 10 |
| 3 | 11 |
| 4 | 36 |
| 5 | 105 |
| 6 | 108 |
| 7 | 114 |
| 8 | 1316 |
| 9 | 3363 |
| 10 | 105516 |
| 11 | 343091 |
| 12 | 1316705 |
| 13 | 3657011 |
| 14 | 10638485 |
| 15 | 13310789 |
| 16 | 33336636 |
| 17 | 37028788 |
| 18 | 1145936870 |
| 19 | 108320504576528 |
| 20 | 3333333366663363 |
| 21 | 105725008289010683 |