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A227594 as a simple table

na(n)
12
24
34
48
516
68
716
864
964
1016
1132
12256
13496
14256
1532
1664
171024
183840
193840
201024
2164
22128
234096
2429676
2556928
2629676
274096
28128
29256
3016384
31229140
32841984
33841984
34229140
3516384
36256
37512
3865536
391768536
4012420672
4123778768
4212420672
431768536

[2,4,4,8,16,8,16,64,64,16,32,256,496,256,32,64,
 1024,3840,3840,1024,64,128,4096,29676,56928,29676,
 4096,128,256,16384,229140,841984,841984,229140,
 16384,256,512,65536,1768536,12420672,23778768,
 12420672,1768536]