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 | 2 |
| 2 | 3 |
| 3 | 9 |
| 4 | 26 |
| 5 | 75 |
| 6 | 213 |
| 7 | 615 |
| 8 | 1853 |
| 9 | 5854 |
| 10 | 18664 |
| 11 | 61248 |
| 12 | 205300 |
| 13 | 698575 |
| 14 | 2409598 |
| 15 | 8408050 |
| 16 | 29657194 |