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) |
|---|---|
| 12 | 1 |
| 13 | 6 |
| 14 | 26 |
| 15 | 91 |
| 16 | 273 |
| 17 | 728 |
| 18 | 1768 |
| 19 | 3978 |
| 20 | 8398 |
| 21 | 16796 |
| 22 | 32065 |
| 23 | 58786 |
| 24 | 104006 |
| 25 | 178296 |
| 26 | 297160 |
| 27 | 482885 |
| 28 | 766935 |
| 29 | 1193010 |
| 30 | 1820910 |
| 31 | 2731365 |
| 32 | 4032015 |
| 33 | 5864749 |
| 34 | 8414640 |
| 35 | 11920740 |
| 36 | 16689036 |
| 37 | 23107896 |
| 38 | 31666376 |
| 39 | 42975796 |