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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 22 |
| 5 | 137 |
| 6 | 273 |
| 7 | 715 |
| 8 | 863 |
| 9 | 2731 |
| 10 | 8541 |
| 11 | 486618 |
| 12 | 877173 |
| 13 | 1378507 |
| 14 | 1731746 |
| 15 | 2273915 |
| 16 | 2436099 |
| 17 | 5401396 |
| 18 | 7153679 |
| 19 | 7560069 |
| 20 | 14529486 |
| 21 | 23887419 |
| 22 | 23975475 |
| 23 | 73114035 |
| 24 | 84890503 |
| 25 | 88837611 |
| 26 | 235680755 |
| 27 | 235769755 |
| 28 | 272515513 |
| 29 | 440021417 |
| 30 | 782357262 |
| 31 | 1414071397 |
| 32 | 2352019439 |