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 | 0 |
| 2 | 1 |
| 3 | 7 |
| 4 | 37 |
| 5 | 217 |
| 6 | 1297 |
| 7 | 7777 |
| 8 | 46657 |
| 9 | 279937 |
| 10 | 1679617 |
| 11 | 10077697 |
| 12 | 60466177 |
| 13 | 362797057 |
| 14 | 860627456 |
| 15 | 2176782337 |