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A051426 as a simple table

na(n)
12
24
312
424
5120
6120
7840
81680
95040
105040
1155440
1255440
13720720
14720720
15720720
161441440
1724504480
1824504480
19465585120
20465585120
21465585120
22465585120
2310708457760
2410708457760
2553542288800
2653542288800
27160626866400
28160626866400
294658179125600

[2,4,12,24,120,120,840,1680,5040,5040,55440,55440,
 720720,720720,720720,1441440,24504480,24504480,
 465585120,465585120,465585120,465585120,
 10708457760,10708457760,53542288800,53542288800,
 160626866400,160626866400,4658179125600]