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A045660 as a simple table

na(n)
00
10
20
312
432
5120
6300
7784
81824
94296
109720
1121824
1247852
13104832
14226576
15487392
161042208
172219520
184703880
199942016
2020940152
2143995544
2292206400
23192843776
24402500844
25838655520
261744509312
273623427624
287515501648

[0,0,0,12,32,120,300,784,1824,4296,9720,21824,
 47852,104832,226576,487392,1042208,2219520,
 4703880,9942016,20940152,43995544,92206400,
 192843776,402500844,838655520,1744509312,
 3623427624,7515501648]