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A350881 as a simple table

na(n)
01
12
24
310
424
550
6140
7368
81152
93682
1011784
1139902
12134612
13463066
141635092
155818384
1620684072
1773693068
18266943648
19967762792
203533666568
2113036452946
2248102671884
23178315730764
24661567489568
252450447537226
269123572154720
2734201574126260

[1,2,4,10,24,50,140,368,1152,3682,11784,39902,
 134612,463066,1635092,5818384,20684072,73693068,
 266943648,967762792,3533666568,13036452946,
 48102671884,178315730764,661567489568,
 2450447537226,9123572154720,34201574126260]