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A293028 as a simple table

na(n)
01
15
231
3153
4745
53779
619011
795121
8475251
92375759
1011880177
1159406541
12297033919
131485165459
147425797777
1537129022423

[1,5,31,153,745,3779,19011,95121,475251,2375759,
 11880177,59406541,297033919,1485165459,7425797777,
 37129022423]