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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 0 |
| 7 | 3 |
| 8 | 9 |
| 9 | 5 |
| 10 | 0 |
| 11 | 4 |
| 12 | 30 |
| 13 | 40 |
| 14 | 15 |
| 15 | 0 |
| 16 | 5 |
| 17 | 90 |
| 18 | 220 |
| 19 | 185 |
| 20 | 52 |
| 21 | 0 |
| 22 | 6 |
| 23 | 255 |
| 24 | 1040 |
| 25 | 1485 |
| 26 | 906 |
| 27 | 203 |
| 28 | 0 |
| 29 | 7 |
| 30 | 693 |
| 31 | 4550 |
| 32 | 9905 |
| 33 | 9891 |
| 34 | 4718 |
| 35 | 877 |
| 36 | 0 |
| 37 | 8 |
| 38 | 1820 |
| 39 | 19040 |
| 40 | 59850 |
| 41 | 87416 |
| 42 | 66808 |
| 43 | 26104 |
| 44 | 4140 |
| 45 | 0 |
| 46 | 9 |
| 47 | 4644 |
| 48 | 77448 |
| 49 | 341082 |
| 50 | 686826 |
| 51 | 750120 |
| 52 | 463212 |
| 53 | 153063 |
| 54 | 21147 |
[1,0,1,0,2,2,0,3,9,5,0,4,30,40,15,0,5,90,220,185, 52,0,6,255,1040,1485,906,203,0,7,693,4550,9905, 9891,4718,877,0,8,1820,19040,59850,87416,66808, 26104,4140,0,9,4644,77448,341082,686826,750120, 463212,153063,21147] |