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) |
|---|---|
| 10 | 1 |
| 11 | 22 |
| 12 | 276 |
| 13 | 2600 |
| 14 | 20475 |
| 15 | 142506 |
| 16 | 906192 |
| 17 | 5379616 |
| 18 | 30260340 |
| 19 | 163011640 |
| 20 | 847660528 |
| 21 | 4280561376 |
| 22 | 21090682613 |
| 23 | 101766230790 |
| 24 | 482320623240 |
| 25 | 2250829575120 |
| 26 | 10363194502115 |
| 27 | 47153358767970 |
| 28 | 212327989773900 |
| 29 | 947309492837400 |
| 30 | 4191844505805495 |
| 31 | 18412956934908690 |
| 32 | 80347448443237920 |