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A138332 as a simple table

na(n)
0-64
1640
2-3456
313440
4-42240
5114048
6-274560
7604032
8-1235520
92379520
10-4356352
117637760
12-12899328
1321085440
14-33488640
1551845376
16-78450240
17116290944
18-169206400
19242070400
20-341003520
21473616000
22-649284480
23879465600
24-1178049600

[-64,640,-3456,13440,-42240,114048,-274560,604032,
 -1235520,2379520,-4356352,7637760,-12899328,
 21085440,-33488640,51845376,-78450240,116290944,
 -169206400,242070400,-341003520,473616000,
 -649284480,879465600,-1178049600]