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A027090 as a simple table

na(n)
21
33
49
528
684
7246
8714
92059
105917
1116971
1248633
13139333
14399267
151144669
163283839
179427981
1827090715
1977911897
20224272499
21646157234
221863317958
235377939756
2415535195892
2544913790501
26129955421387
27376313609029

[1,3,9,28,84,246,714,2059,5917,16971,48633,139333,
 399267,1144669,3283839,9427981,27090715,77911897,
 224272499,646157234,1863317958,5377939756,
 15535195892,44913790501,129955421387,376313609029]