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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 3 |
| 3 | 6 |
| 4 | 6 |
| 5 | 20 |
| 6 | 6 |
| 7 | 70 |
| 8 | 20 |
| 9 | 70 |
| 10 | 20 |
| 11 | 1034 |
| 12 | 20 |
| 13 | 4108 |
| 14 | 70 |
| 15 | 264 |
| 16 | 264 |
| 17 | 65552 |
| 18 | 70 |
| 19 | 262162 |
| 20 | 264 |
| 21 | 4108 |
| 22 | 1034 |
| 23 | 4194326 |
| 24 | 264 |
| 25 | 1048596 |
| 26 | 4108 |
| 27 | 262162 |
| 28 | 4108 |
| 29 | 268435484 |
| 30 | 264 |
| 31 | 1073741854 |
| 32 | 65552 |
| 33 | 1048596 |
| 34 | 65552 |
| 35 | 16777240 |
| 36 | 4108 |
| 37 | 68719476772 |
| 38 | 262162 |
| 39 | 16777240 |
| 40 | 65552 |
[3,3,6,6,20,6,70,20,70,20,1034,20,4108,70,264,264, 65552,70,262162,264,4108,1034,4194326,264,1048596, 4108,262162,4108,268435484,264,1073741854,65552, 1048596,65552,16777240,4108,68719476772,262162, 16777240,65552] |