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A272709 as a simple table

na(n)
12
24
38
416
524
648
796
8192
9384
10576
111152
122304
133456
146912
1510368
1620736
1731104
1862208
19124416
20186624
21373248
22746496
231492992
242985984
253234816
264829184
279658368
2819316736
2928975104
3043462656
3186925312
32173850624
33347701248
34519561216
35779341824
361558683648

[2,4,8,16,24,48,96,192,384,576,1152,2304,3456,
 6912,10368,20736,31104,62208,124416,186624,373248,
 746496,1492992,2985984,3234816,4829184,9658368,
 19316736,28975104,43462656,86925312,173850624,
 347701248,519561216,779341824,1558683648]