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A281125 as a simple table

na(n)
11
228
3574
45590
548828
6394202
73042893
822772368
9166675727
101199580226
118520471567
1259882031330
13417204045166
142885615431576
1519835570766874
16135626535970070
17923084270635629
186257223861792470
1942263904928277217

[1,28,574,5590,48828,394202,3042893,22772368,
 166675727,1199580226,8520471567,59882031330,
 417204045166,2885615431576,19835570766874,
 135626535970070,923084270635629,6257223861792470,
 42263904928277217]