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) |
|---|---|
| 4 | 1 |
| 5 | 18 |
| 6 | 59 |
| 7 | 146 |
| 8 | 319 |
| 9 | 652 |
| 10 | 1281 |
| 11 | 2456 |
| 12 | 4637 |
| 13 | 8670 |
| 14 | 16111 |
| 15 | 29822 |
| 16 | 55067 |
| 17 | 101528 |
| 18 | 187013 |
| 19 | 344276 |
| 20 | 633561 |
| 21 | 1165674 |
| 22 | 2144419 |
| 23 | 3944650 |
| 24 | 7255831 |
| 25 | 13346084 |
| 26 | 24547849 |
| 27 | 45151152 |
| 28 | 83046581 |
| 29 | 152747190 |
| 30 | 280946647 |
| 31 | 516742262 |
| 32 | 950438067 |