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A157552 as a simple table

na(n)
21
33
442
53410
6143445
74303761
8117586819
92875510809
1067804504560
111524258428187
1233435072500775
13715914503534022
1414685555146992730
15286576099225123995
165347457520977926782
1796148425385860533358

[1,3,42,3410,143445,4303761,117586819,2875510809,
 67804504560,1524258428187,33435072500775,
 715914503534022,14685555146992730,
 286576099225123995,5347457520977926782,
 96148425385860533358]