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A287737 as a simple table

na(n)
01
12
20
38
48
50
60
7192
80
964
10256
110
124096
134096
1417408
1536864
160
17197632
1865536
1916384
201064960
211073152
221638400
23786432
2465536
25360448
261048576
2760817408
284980736
29547356672
300
310
32806354944
331736704000
3430077353984
351090519040
3667108864
37813694976

[1,2,0,8,8,0,0,192,0,64,256,0,4096,4096,17408,
 36864,0,197632,65536,16384,1064960,1073152,
 1638400,786432,65536,360448,1048576,60817408,
 4980736,547356672,0,0,806354944,1736704000,
 30077353984,1090519040,67108864,813694976]