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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 3 |
| 7 | 11 |
| 8 | 36 |
| 9 | 116 |
| 10 | 366 |
| 11 | 1151 |
| 12 | 3583 |
| 13 | 11093 |
| 14 | 34141 |
| 15 | 104489 |
| 16 | 318139 |
| 17 | 963899 |
| 18 | 2907276 |
| 19 | 8731919 |
| 20 | 26125538 |
| 21 | 77889504 |
| 22 | 231466147 |
| 23 | 685811867 |
| 24 | 2026481941 |
| 25 | 5973064855 |
| 26 | 17565416721 |
| 27 | 51547293439 |
| 28 | 150977445294 |
| 29 | 441409701444 |
| 30 | 1288409915625 |
| 31 | 3754926609800 |
| 32 | 10927779696264 |
[1,3,11,36,116,366,1151,3583,11093,34141,104489, 318139,963899,2907276,8731919,26125538,77889504, 231466147,685811867,2026481941,5973064855, 17565416721,51547293439,150977445294,441409701444, 1288409915625,3754926609800,10927779696264] |