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| n | a(n) |
|---|---|
| 12 | 1 |
| 13 | 1 |
| 14 | 7 |
| 15 | 19 |
| 16 | 72 |
| 17 | 196 |
| 18 | 561 |
| 19 | 1368 |
| 20 | 3260 |
| 21 | 7105 |
| 22 | 14938 |
| 23 | 29624 |
| 24 | 56822 |
| 25 | 104468 |
| 26 | 186616 |
| 27 | 322786 |
| 28 | 544802 |
| 29 | 896259 |
| 30 | 1444147 |
| 31 | 2278640 |
| 32 | 3532144 |
| 33 | 5380034 |
| 34 | 8070400 |
| 35 | 11926928 |
| 36 | 17393969 |
| 37 | 25042836 |
| 38 | 35638596 |
| 39 | 50152013 |
| 40 | 69855536 |
[1,1,7,19,72,196,561,1368,3260,7105,14938,29624, 56822,104468,186616,322786,544802,896259,1444147, 2278640,3532144,5380034,8070400,11926928,17393969, 25042836,35638596,50152013,69855536] |