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A239530 as a simple table

na(n)
11
21
36
413
547
6128
7405
81181
93598
1010705
1132259
1296544
13290009
14869417
152609238
167826117
1723480935
1870438624
19211322637
20633956965
211901888606
225705637161
2317116957851
2451350798528
25154052516977
26462157354513
271386472381350

[1,1,6,13,47,128,405,1181,3598,10705,32259,96544,
 290009,869417,2609238,7826117,23480935,70438624,
 211322637,633956965,1901888606,5705637161,
 17116957851,51350798528,154052516977,462157354513,
 1386472381350]