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) |
|---|---|
| 1 | 2 |
| 2 | 162 |
| 3 | 2592 |
| 4 | 20000 |
| 5 | 101250 |
| 6 | 388962 |
| 7 | 1229312 |
| 8 | 3359232 |
| 9 | 8201250 |
| 10 | 18301250 |
| 11 | 37949472 |
| 12 | 74030112 |
| 13 | 137149922 |
| 14 | 243101250 |
| 15 | 414720000 |
| 16 | 684204032 |
| 17 | 1095962562 |
| 18 | 1710072162 |
| 19 | 2606420000 |
| 20 | 3889620000 |
| 21 | 5694792642 |
| 22 | 8194304162 |
| 23 | 11605565952 |
| 24 | 16200000000 |
| 25 | 22313281250 |
| 26 | 30356972802 |