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A307617 as a simple table

na(n)
11
22
34
46
512
660
7120
8360
9840
102520
1127720
1255440
13360360
14720720
1512252240
16232792560
171163962800
183491888400
195354228880

[1,2,4,6,12,60,120,360,840,2520,27720,55440,
 360360,720720,12252240,232792560,1163962800,
 3491888400,5354228880]