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A273526 as a simple table

na(n)
11
21
33
411
538
6127
7423
81423
94854
1016787
1158776
12208001
13742888
142674427
159694831
1635357655
17129644774
18477638683
191767263172
206564120401
2124466267000
2291482563619
23343059613628
241289904147301
254861946401428
2618367353072127
2769533550915978
28263747951750333
291002242216651340
303814986502092275

[1,1,3,11,38,127,423,1423,4854,16787,58776,208001,
 742888,2674427,9694831,35357655,129644774,
 477638683,1767263172,6564120401,24466267000,
 91482563619,343059613628,1289904147301,
 4861946401428,18367353072127,69533550915978,
 263747951750333,1002242216651340,3814986502092275]