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 | 3 |
| 4 | 9 |
| 5 | 23 |
| 6 | 58 |
| 7 | 134 |
| 8 | 308 |
| 9 | 677 |
| 10 | 1470 |
| 11 | 3106 |
| 12 | 6479 |
| 13 | 13260 |
| 14 | 26827 |
| 15 | 53516 |