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A099012 as a simple table

na(n)
00
11
23
318
481
5405
61944
79477
845927
9223074
101082565
115255361
1225509168
13123825753
14601059771
152917611090
1614162371209
1768745613437
18333698181192
191619805064509
207862698824255
2138166342053346
22185263315578333

[0,1,3,18,81,405,1944,9477,45927,223074,1082565,
 5255361,25509168,123825753,601059771,2917611090,
 14162371209,68745613437,333698181192,
 1619805064509,7862698824255,38166342053346,
 185263315578333]