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A091139 as a simple table

na(n)
01
11
22
35
416
566
6346
72229
817000
9148898
101465364
1115957314
12190158712
132459041744
1434278016954
15512253587397
168168812190472
17138450960309882

[1,1,2,5,16,66,346,2229,17000,148898,1465364,
 15957314,190158712,2459041744,34278016954,
 512253587397,8168812190472,138450960309882]