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A288700 as a simple table

na(n)
01
12
20
38
48
532
632
7128
8128
9512
10512
112048
122048
138192
148192
1532768
1632768
17131072
18131072
19524288
20524288
212097152
222097152
238388608
248388608
2533554432
2633554432
27134217728
28134217728
29536870912
30536870912
312147483648
322147483648
338589934592

[1,2,0,8,8,32,32,128,128,512,512,2048,2048,8192,
 8192,32768,32768,131072,131072,524288,524288,
 2097152,2097152,8388608,8388608,33554432,33554432,
 134217728,134217728,536870912,536870912,
 2147483648,2147483648,8589934592]