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 | 18 |
| 2 | 324 |
| 3 | 1350 |
| 4 | 5625 |
| 5 | 15525 |
| 6 | 42849 |
| 7 | 95220 |
| 8 | 211600 |
| 9 | 409860 |
| 10 | 793881 |
| 11 | 1397088 |
| 12 | 2458624 |
| 13 | 4029760 |
| 14 | 6604900 |
| 15 | 10246590 |
| 16 | 15896169 |
| 17 | 23603040 |
| 18 | 35046400 |
| 19 | 50207520 |
| 20 | 71927361 |
| 21 | 100016433 |
| 22 | 139074849 |
| 23 | 188570070 |
| 24 | 255680100 |
| 25 | 339259830 |
| 26 | 450161089 |
| 27 | 586225710 |