| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 16 |
| 3 | 16 |
| 4 | 60 |
| 5 | 256 |
| 6 | 60 |
| 7 | 222 |
| 8 | 3600 |
| 9 | 3600 |
| 10 | 222 |
| 11 | 804 |
| 12 | 49284 |
| 13 | 178068 |
| 14 | 49284 |
| 15 | 804 |
| 16 | 2872 |
| 17 | 646416 |
| 18 | 8459154 |
| 19 | 8459154 |
| 20 | 646416 |
| 21 | 2872 |
| 22 | 10132 |
| 23 | 8248384 |
| 24 | 376812420 |
| 25 | 1376175262 |
| 26 | 376812420 |
| 27 | 8248384 |
| 28 | 10132 |
| 29 | 35383 |
| 30 | 102657424 |
| 31 | 16109362560 |
| 32 | 205495778969 |
[4,16,16,60,256,60,222,3600,3600,222,804,49284, 178068,49284,804,2872,646416,8459154,8459154, 646416,2872,10132,8248384,376812420,1376175262, 376812420,8248384,10132,35383,102657424, 16109362560,205495778969] |