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 | 7 |
| 2 | 23 |
| 3 | 66 |
| 4 | 183 |
| 5 | 487 |
| 6 | 1278 |
| 7 | 3319 |
| 8 | 8591 |
| 9 | 22210 |
| 10 | 57455 |
| 11 | 148815 |
| 12 | 386046 |
| 13 | 1002991 |
| 14 | 2609559 |
| 15 | 6797794 |