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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 10 |
| 4 | 4 |
| 5 | 46 |
| 6 | 22 |
| 7 | 16 |
| 8 | 46 |
| 9 | 66 |
| 10 | 136 |
| 11 | 166 |
| 12 | 124 |
| 13 | 636 |
| 14 | 550 |
| 15 | 1474 |
| 16 | 3066 |
| 17 | 1656 |
| 18 | 1816 |
| 19 | 3708 |
| 20 | 9436 |
| 21 | 1746 |
| 22 | 3696 |
| 23 | 11262 |
| 24 | 40138 |
| 25 | 25900 |
| 26 | 20808 |
| 27 | 60340 |
| 28 | 58818 |
[2,4,10,4,46,22,16,46,66,136,166,124,636,550,1474, 3066,1656,1816,3708,9436,1746,3696,11262,40138, 25900,20808,60340,58818] |