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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 16 |
| 3 | 16 |
| 4 | 56 |
| 5 | 256 |
| 6 | 56 |
| 7 | 250 |
| 8 | 4020 |
| 9 | 4020 |
| 10 | 250 |
| 11 | 984 |
| 12 | 64862 |
| 13 | 252520 |
| 14 | 64862 |
| 15 | 984 |
| 16 | 3888 |
| 17 | 1029672 |
| 18 | 16187862 |
| 19 | 16187862 |
| 20 | 1029672 |
| 21 | 3888 |
| 22 | 15798 |
| 23 | 16468836 |
| 24 | 1028824446 |
| 25 | 4160361190 |
| 26 | 1028824446 |
| 27 | 16468836 |
| 28 | 15798 |
| 29 | 63092 |
| 30 | 262860066 |
| 31 | 65676456950 |
[4,16,16,56,256,56,250,4020,4020,250,984,64862, 252520,64862,984,3888,1029672,16187862,16187862, 1029672,3888,15798,16468836,1028824446,4160361190, 1028824446,16468836,15798,63092,262860066, 65676456950] |