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A142866 as a simple table

na(n)
11
21
31
43
54
612
716
848
964
10210
11276
12947
131252
144510
156028
1622406
1730364
18116506

[1,1,1,3,4,12,16,48,64,210,276,947,1252,4510,6028,
 22406,30364,116506]