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A033550 as a simple table

na(n)
02
12
25
315
443
5118
6316
7836
82199
95769
1015117
1139592
12103670
13271430
14710633
151860483
164870831
1712752026
1833385264
1987403784
20228826107
21599074557
221568397585
234106118220
2410749957098
2528143753098
2673681302221
27192900153591

[2,2,5,15,43,118,316,836,2199,5769,15117,39592,
 103670,271430,710633,1860483,4870831,12752026,
 33385264,87403784,228826107,599074557,1568397585,
 4106118220,10749957098,28143753098,73681302221,
 192900153591]