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 | 291600 |
| 2 | 1406250 |
| 3 | 2097152 |
| 4 | 13436928 |
| 5 | 34012224 |
| 6 | 36382500 |
| 7 | 46656000 |
| 8 | 180033840 |
| 9 | 393216000 |
| 10 | 1073741824 |
| 11 | 1360800000 |
| 12 | 1771470000 |
| 13 | 4900921200 |
| 14 | 8576868300 |
| 15 | 12884901888 |
| 16 | 13588459500 |
| 17 | 13608154560 |
| 18 | 17496198720 |
| 19 | 46490458680 |
| 20 | 113810780160 |
| 21 | 125475189840 |
| 22 | 141557760000 |
| 23 | 181474110720 |