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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 7 |
| 3 | 14 |
| 4 | 42 |
| 5 | 42 |
| 6 | 462 |
| 7 | 462 |
| 8 | 858 |
| 9 | 3003 |
| 10 | 1001 |
| 11 | 4004 |
| 12 | 6188 |
| 13 | 18564 |
| 14 | 27132 |
| 15 | 3876 |
| 16 | 27132 |
| 17 | 74613 |
| 18 | 100947 |
| 19 | 67298 |
| 20 | 17710 |
| 21 | 230230 |
| 22 | 296010 |
| 23 | 188370 |
| 24 | 237510 |
| 25 | 118755 |
| 26 | 736281 |
| 27 | 453096 |
| 28 | 553784 |
| 29 | 1344904 |
| 30 | 324632 |