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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | 2 |
| 6 | 0 |
| 7 | 10 |
| 8 | 64 |
| 9 | 3 |
| 10 | 0 |
| 11 | 20 |
| 12 | 831 |
| 13 | 240 |
| 14 | 4 |
| 15 | 0 |
| 16 | 35 |
| 17 | 6760 |
| 18 | 9641 |
| 19 | 624 |
| 20 | 5 |
| 21 | 0 |
| 22 | 56 |
| 23 | 40748 |
| 24 | 244322 |
| 25 | 50018 |
| 26 | 1340 |
| 27 | 6 |
| 28 | 0 |
| 29 | 84 |
| 30 | 198496 |
| 31 | 4401281 |
| 32 | 2703376 |
| 33 | 183940 |
| 34 | 2544 |
| 35 | 7 |
| 36 | 0 |
| 37 | 120 |
| 38 | 823058 |
| 39 | 60910912 |
| 40 | 108412740 |
| 41 | 17196520 |
| 42 | 549145 |
| 43 | 4424 |
| 44 | 8 |
| 45 | 0 |
| 46 | 165 |
| 47 | 3005484 |
| 48 | 683216362 |
| 49 | 3396389392 |
| 50 | 1223521735 |
| 51 | 80513160 |
| 52 | 1416331 |
| 53 | 7200 |
| 54 | 9 |
| 55 | 0 |
[0,1,0,4,2,0,10,64,3,0,20,831,240,4,0,35,6760, 9641,624,5,0,56,40748,244322,50018,1340,6,0,84, 198496,4401281,2703376,183940,2544,7,0,120,823058, 60910912,108412740,17196520,549145,4424,8,0,165, 3005484,683216362,3396389392,1223521735,80513160, 1416331,7200,9,0] |