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A154000 as a simple table

na(n)
01
12
22
34
416
531
6126
71009
83933
931428
10512187
114017316
1264213559
132090787507
1432776879657
151046731134966
1668125822829775
172134091162950790
18136215005250379929
1917716724971218816648
201109196056459852373561

[1,2,2,4,16,31,126,1009,3933,31428,512187,4017316,
 64213559,2090787507,32776879657,1046731134966,
 68125822829775,2134091162950790,
 136215005250379929,17716724971218816648,
 1109196056459852373561]