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A053299 as a simple table

na(n)
12
223
3139
41831
530593
6162143
71100977
810343761
9147684137
101202442089
1112109172293
12156798792223
131051602787181
1420761252261751
15110526670235599
161271309838631957

[2,23,139,1831,30593,162143,1100977,10343761,
 147684137,1202442089,12109172293,156798792223,
 1051602787181,20761252261751,110526670235599,
 1271309838631957]