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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 1 |
| 16 | 5 |
| 17 | 19 |
| 18 | 33 |
| 19 | 33 |
| 20 | 19 |
| 21 | 5 |
| 22 | 15 |
| 23 | 120 |
| 24 | 413 |
| 25 | 615 |
| 26 | 413 |
| 27 | 120 |
| 28 | 15 |
| 29 | 35 |
| 30 | 483 |
| 31 | 2859 |
| 32 | 6997 |
| 33 | 6997 |
| 34 | 2859 |
| 35 | 483 |
| 36 | 35 |
| 37 | 70 |
| 38 | 1500 |
| 39 | 13976 |
| 40 | 53950 |
| 41 | 84910 |
| 42 | 53950 |
| 43 | 13976 |
| 44 | 1500 |
| 45 | 70 |
| 46 | 126 |
| 47 | 3923 |
| 48 | 54199 |
| 49 | 315198 |
| 50 | 762227 |
| 51 | 762227 |
| 52 | 315198 |
| 53 | 54199 |
| 54 | 3923 |
| 55 | 126 |
| 56 | 210 |
[0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,5,19,33,33,19,5,15, 120,413,615,413,120,15,35,483,2859,6997,6997,2859, 483,35,70,1500,13976,53950,84910,53950,13976,1500, 70,126,3923,54199,315198,762227,762227,315198, 54199,3923,126,210] |