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) |
|---|---|
| 6 | 60 |
| 7 | 105 |
| 8 | 448 |
| 9 | 2016 |
| 10 | 4980 |
| 11 | 15675 |
| 12 | 61644 |
| 13 | 155155 |
| 14 | 482573 |
| 15 | 1733550 |
| 16 | 4549808 |
| 17 | 13890360 |
| 18 | 48104628 |
| 19 | 128949675 |
| 20 | 392009140 |
| 21 | 1322692581 |
| 22 | 3607864403 |
| 23 | 10929721440 |
| 24 | 36245555284 |
| 25 | 100109572875 |
| 26 | 302709337515 |
| 27 | 990788537700 |
| 28 | 2763564406113 |
| 29 | 8344789976616 |
| 30 | 27039048750600 |