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A103972 as a simple table

na(n)
01
16
212
360
4264
51392
67392
741424
8236640
91384512
108224896
1149554816
12301884672
131856878080
1411514915840
1571915838720
16451938731520
172855705994240
1818132621772800
19115637702461440
20740356410961920
214756888756101120
2230662391191715840
23198229520200704000
241285001080928845824

[1,6,12,60,264,1392,7392,41424,236640,1384512,
 8224896,49554816,301884672,1856878080,11514915840,
 71915838720,451938731520,2855705994240,
 18132621772800,115637702461440,740356410961920,
 4756888756101120,30662391191715840,
 198229520200704000,1285001080928845824]