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A269795 as a simple table

na(n)
12
20
36
42
530
624
7126
828
9504
10480
112046
12990
138190
148064
1532730
164064
17131070
18130536
19524286
20261630
212097018
222095104
238388606
242096100
2533554400
2633546240
27134217216
2867100670
29536870910
30536837640
312147483646
32134213632
338589932538
348589803520
3534359738210

[2,0,6,2,30,24,126,28,504,480,2046,990,8190,8064,
 32730,4064,131070,130536,524286,261630,2097018,
 2095104,8388606,2096100,33554400,33546240,
 134217216,67100670,536870910,536837640,2147483646,
 134213632,8589932538,8589803520,34359738210]