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A208640 as a simple table

na(n)
116
289
3284
4722
51652
63577
77504
815448
931440
1063543
11127884
12256718
13514556
141030421
152062360
164126468
178254936
1816512147
1933026868
2066056634
21132116516
22264236657
23528477344
241056959152
252113923232
264227851887
278455709724

[16,89,284,722,1652,3577,7504,15448,31440,63543,
 127884,256718,514556,1030421,2062360,4126468,
 8254936,16512147,33026868,66056634,132116516,
 264236657,528477344,1056959152,2113923232,
 4227851887,8455709724]