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A302689 as a simple table

na(n)
12
20
30
44
516
644
7104
8228
9480
10988
112008
124052
138144
1416332
1532712
1665476
17131008
18262076
19524216
201048500
212097072
224194220
238388520
2416777124
2533554336
2667108764
27134217624
28268435348
29536870800
301073741708
312147483528
324294967172
338589934464

[2,0,0,4,16,44,104,228,480,988,2008,4052,8144,
 16332,32712,65476,131008,262076,524216,1048500,
 2097072,4194220,8388520,16777124,33554336,
 67108764,134217624,268435348,536870800,1073741708,
 2147483528,4294967172,8589934464]