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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 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 1 |
| 23 | 0 |
| 24 | 2 |
| 25 | 2 |
| 26 | 5 |
| 27 | 7 |
| 28 | 17 |
| 29 | 21 |
| 30 | 43 |
| 31 | 63 |
| 32 | 111 |
| 33 | 165 |
| 34 | 283 |
| 35 | 419 |
| 36 | 688 |
| 37 | 1040 |
| 38 | 1651 |
| 39 | 2494 |
| 40 | 3909 |
| 41 | 5887 |
| 42 | 9104 |
| 43 | 13735 |
| 44 | 21026 |
| 45 | 31694 |
| 46 | 48303 |
| 47 | 72780 |
| 48 | 110592 |
| 49 | 166965 |
| 50 | 253636 |
| 51 | 384221 |
| 52 | 585754 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2, 2,5,7,17,21,43,63,111,165,283,419,688,1040,1651, 2494,3909,5887,9104,13735,21026,31694,48303,72780, 110592,166965,253636,384221,585754] |