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 | 21 |
| 3 | 252 |
| 4 | 1022 |
| 5 | 1589 |
| 6 | 2044 |
| 7 | 2212 |
| 8 | 2723 |
| 9 | 3122 |
| 10 | 3178 |
| 11 | 3290 |
| 12 | 17892 |
| 13 | 20475 |
| 14 | 21483 |
| 15 | 21987 |
| 16 | 25578 |
| 17 | 26586 |
| 18 | 102837 |
| 19 | 147420 |
| 20 | 177443 |
| 21 | 213402 |
| 22 | 217938 |
| 23 | 1445787 |
| 24 | 1449819 |
| 25 | 1646442 |
| 26 | 1707930 |
| 27 | 1711962 |
| 28 | 1715994 |
| 29 | 1740690 |
| 30 | 1752786 |
| 31 | 1777482 |
| 32 | 1941345 |