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 | 24 |
| 3 | 75 |
| 4 | 211 |
| 5 | 522 |
| 6 | 1332 |
| 7 | 3588 |
| 8 | 8900 |
| 9 | 20552 |
| 10 | 48304 |
| 11 | 118768 |
| 12 | 256864 |
| 13 | 558272 |
| 14 | 1564608 |
| 15 | 2863360 |