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 | 3 |
| 5 | 18 |
| 6 | 63 |
| 7 | 168 |
| 8 | 378 |
| 9 | 756 |
| 10 | 1386 |
| 11 | 2376 |
| 12 | 3861 |
| 13 | 6006 |
| 14 | 9009 |
| 15 | 13104 |
| 16 | 18564 |
| 17 | 25704 |
| 18 | 34884 |
| 19 | 46512 |
| 20 | 61047 |
| 21 | 79002 |
| 22 | 100947 |
| 23 | 127512 |
| 24 | 159390 |
| 25 | 197340 |
| 26 | 242190 |
| 27 | 294840 |
| 28 | 356265 |
| 29 | 427518 |
| 30 | 509733 |
| 31 | 604128 |
| 32 | 712008 |
| 33 | 834768 |
| 34 | 973896 |
| 35 | 1130976 |
| 36 | 1307691 |
| 37 | 1505826 |
| 38 | 1727271 |
| 39 | 1974024 |
| 40 | 2248194 |