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A291036 as a simple table

na(n)
02
16
216
346
4132
5376
61074
73066
88752
924986
1071328
11203624
12581298
131659462
144737360
1513524006
1638607732
17110215648
18314638754
19898216794
202564189568
217320134930
2220897197344
2359656394448
24170304435554
25486177568038
261387918211824
273962167507006

[2,6,16,46,132,376,1074,3066,8752,24986,71328,
 203624,581298,1659462,4737360,13524006,38607732,
 110215648,314638754,898216794,2564189568,
 7320134930,20897197344,59656394448,170304435554,
 486177568038,1387918211824,3962167507006]