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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 0 |
| 4 | 22 |
| 5 | 33 |
| 6 | 181 |
| 7 | 375 |
| 8 | 1120 |
| 9 | 2342 |
| 10 | 5467 |
| 11 | 10668 |
| 12 | 21660 |
| 13 | 39562 |
| 14 | 72816 |
| 15 | 125484 |
| 16 | 215161 |
| 17 | 352424 |
| 18 | 572086 |
| 19 | 897867 |
| 20 | 1394315 |
| 21 | 2110350 |
| 22 | 3159826 |
| 23 | 4635480 |
| 24 | 6731131 |
| 25 | 9612072 |
| 26 | 13595657 |
| 27 | 18964299 |
| 28 | 26221103 |
| 29 | 35828058 |
| 30 | 48562922 |
| 31 | 65155439 |
| 32 | 86777107 |
| 33 | 114549589 |
| 34 | 150198041 |
| 35 | 195400674 |
| 36 | 252651242 |
[1,0,2,0,22,33,181,375,1120,2342,5467,10668,21660, 39562,72816,125484,215161,352424,572086,897867, 1394315,2110350,3159826,4635480,6731131,9612072, 13595657,18964299,26221103,35828058,48562922, 65155439,86777107,114549589,150198041,195400674, 252651242] |