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 | 11 |
| 3 | 66 |
| 4 | 278 |
| 5 | 966 |
| 6 | 2957 |
| 7 | 8149 |
| 8 | 20676 |
| 9 | 48911 |
| 10 | 108942 |
| 11 | 230201 |
| 12 | 464528 |
| 13 | 899633 |
| 14 | 1679685 |
| 15 | 3034620 |