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 | 1 |
| 2 | 5 |
| 3 | 19 |
| 4 | 57 |
| 5 | 161 |
| 6 | 449 |
| 7 | 1247 |
| 8 | 3457 |
| 9 | 9577 |
| 10 | 26525 |
| 11 | 73459 |
| 12 | 203433 |
| 13 | 563369 |
| 14 | 1560137 |
| 15 | 4320479 |
| 16 | 11964673 |