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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 0 |
| 10 | 1 |
| 11 | 2 |
| 12 | 3 |
| 13 | 3 |
| 14 | 5 |
| 15 | 6 |
| 16 | 14 |
| 17 | 9 |
| 18 | 20 |
| 19 | 20 |
| 20 | 56 |
| 21 | 32 |
| 22 | 80 |
| 23 | 64 |
| 24 | 224 |
| 25 | 114 |
| 26 | 315 |
| 27 | 217 |
| 28 | 863 |
| 29 | 397 |
| 30 | 1234 |
| 31 | 751 |
| 32 | 3331 |
| 33 | 1400 |
| 34 | 4816 |
| 35 | 2632 |
| 36 | 12815 |
| 37 | 4973 |
| 38 | 18792 |
| 39 | 9349 |
| 40 | 49400 |
| 41 | 17810 |
| 42 | 73338 |
| 43 | 33557 |
| 44 | 190643 |
| 45 | 64309 |
| 46 | 286368 |
| 47 | 121511 |
| 48 | 737532 |
| 49 | 233891 |
| 50 | 1119215 |
| 51 | 443271 |
| 52 | 2859154 |
[0,0,0,0,0,0,1,1,0,1,2,3,3,5,6,14,9,20,20,56,32, 80,64,224,114,315,217,863,397,1234,751,3331,1400, 4816,2632,12815,4973,18792,9349,49400,17810,73338, 33557,190643,64309,286368,121511,737532,233891, 1119215,443271,2859154] |