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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 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 2 |
| 26 | 3 |
| 27 | 9 |
| 28 | 17 |
| 29 | 38 |
| 30 | 66 |
| 31 | 133 |
| 32 | 230 |
| 33 | 425 |
| 34 | 724 |
| 35 | 1275 |
| 36 | 2138 |
| 37 | 3659 |
| 38 | 6052 |
| 39 | 10132 |
| 40 | 16613 |
| 41 | 27413 |
| 42 | 44625 |
| 43 | 72993 |
| 44 | 118392 |
| 45 | 192814 |
| 46 | 312805 |
| 47 | 509922 |
| 48 | 831670 |
| 49 | 1366442 |
| 50 | 2257782 |
| 51 | 3774641 |
| 52 | 6388609 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 2,3,9,17,38,66,133,230,425,724,1275,2138,3659, 6052,10132,16613,27413,44625,72993,118392,192814, 312805,509922,831670,1366442,2257782,3774641, 6388609] |