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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 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 2 |
| 35 | 19 |
| 36 | 91 |
| 37 | 380 |
| 38 | 1364 |
| 39 | 4530 |
| 40 | 14049 |
| 41 | 41594 |
| 42 | 118314 |
| 43 | 326371 |
| 44 | 876808 |
| 45 | 2304698 |
| 46 | 5943424 |
| 47 | 15075624 |
| 48 | 37678585 |
| 49 | 92930306 |
| 50 | 226443556 |
| 51 | 545661140 |
| 52 | 1301306496 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,2,19,91,380,1364,4530,14049, 41594,118314,326371,876808,2304698,5943424, 15075624,37678585,92930306,226443556,545661140, 1301306496] |