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A011800 as a simple table

na(n)
01
11
22
37
434
5206
61486
712412
8117692
91248004
1014625856
11187638716
122614602112
1339310384192
14634148436104
1510923398137576
16200069534481616
173882002527006352
1879535575126745632
191715658099715217584

[1,1,2,7,34,206,1486,12412,117692,1248004,
 14625856,187638716,2614602112,39310384192,
 634148436104,10923398137576,200069534481616,
 3882002527006352,79535575126745632,
 1715658099715217584]