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A192849 as a simple table

na(n)
10
20
324
4240
51080
63360
78400
818144
935280
1063360
11106920
12171600
13264264
14393120
15567840
16799680
171101600
181488384
191976760
202585520
213335640
224250400
235355504
246679200
258252400
2610108800
2712285000
2814820624
2917758440
3021144480

[0,0,24,240,1080,3360,8400,18144,35280,63360,
 106920,171600,264264,393120,567840,799680,1101600,
 1488384,1976760,2585520,3335640,4250400,5355504,
 6679200,8252400,10108800,12285000,14820624,
 17758440,21144480]