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A203032 as a simple table

na(n)
14
228
3396
44904
557100
6690204
78590508
8107540900
91351412312
1017089354228
11217260030296
122772566648936
1335493572774080
14455659755476112
155864044526023588
1675626604339946212
17977151287857792884

[4,28,396,4904,57100,690204,8590508,107540900,
 1351412312,17089354228,217260030296,2772566648936,
 35493572774080,455659755476112,5864044526023588,
 75626604339946212,977151287857792884]