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A263952 as a simple table

na(n)
16
236
3158
4614
52596
611045
747252
8200690
9856618
103643558
1115489384
1265863683
13280302564
141192057233
155068539465
1621551848324
1791660701076
18389792005662
191657541261871
207048510785986
2129974349818876
22127465944902477

[6,36,158,614,2596,11045,47252,200690,856618,
 3643558,15489384,65863683,280302564,1192057233,
 5068539465,21551848324,91660701076,389792005662,
 1657541261871,7048510785986,29974349818876,
 127465944902477]