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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 3 |
| 6 | 0 |
| 7 | 5 |
| 8 | 11 |
| 9 | 19 |
| 10 | 0 |
| 11 | 15 |
| 12 | 49 |
| 13 | 109 |
| 14 | 201 |
| 15 | 0 |
| 16 | 52 |
| 17 | 257 |
| 18 | 742 |
| 19 | 1657 |
| 20 | 3176 |
| 21 | 0 |
| 22 | 203 |
| 23 | 1539 |
| 24 | 5815 |
| 25 | 15821 |
| 26 | 35451 |
| 27 | 69823 |
| 28 | 0 |
| 29 | 877 |
| 30 | 10299 |
| 31 | 51193 |
| 32 | 170389 |
| 33 | 447981 |
| 34 | 1007407 |
| 35 | 2026249 |
| 36 | 0 |
| 37 | 4140 |
| 38 | 75905 |
| 39 | 498118 |
| 40 | 2032785 |
| 41 | 6282416 |
| 42 | 16157905 |
| 43 | 36458010 |
| 44 | 74565473 |
[1,0,1,0,2,3,0,5,11,19,0,15,49,109,201,0,52,257, 742,1657,3176,0,203,1539,5815,15821,35451,69823,0, 877,10299,51193,170389,447981,1007407,2026249,0, 4140,75905,498118,2032785,6282416,16157905, 36458010,74565473] |