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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 1 |
| 5 | 4 |
| 6 | 3 |
| 7 | 12 |
| 8 | 16 |
| 9 | 40 |
| 10 | 56 |
| 11 | 122 |
| 12 | 197 |
| 13 | 408 |
| 14 | 695 |
| 15 | 1352 |
| 16 | 2368 |
| 17 | 4512 |
| 18 | 8096 |
| 19 | 15202 |
| 20 | 27529 |
| 21 | 51196 |
| 22 | 93339 |
| 23 | 172852 |
| 24 | 316368 |
| 25 | 584104 |
| 26 | 1071160 |
| 27 | 1974458 |
| 28 | 3625613 |
| 29 | 6677104 |
| 30 | 12269359 |
| 31 | 22583120 |
| 32 | 41513728 |
| 33 | 76387712 |
| 34 | 140454656 |
| 35 | 258398850 |
| 36 | 475182353 |
[0,0,0,2,1,4,3,12,16,40,56,122,197,408,695,1352, 2368,4512,8096,15202,27529,51196,93339,172852, 316368,584104,1071160,1974458,3625613,6677104, 12269359,22583120,41513728,76387712,140454656, 258398850,475182353] |