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A229604 as a simple table

na(n)
140
23924
3131345
43476928
582613904
61840258874
739229935270
8809714005005
916301446350838
10321725691680589
116247090415396847
12119665707667897987
132265983192057928009
1442485559978048128856
15789743391503380249568

[40,3924,131345,3476928,82613904,1840258874,
 39229935270,809714005005,16301446350838,
 321725691680589,6247090415396847,
 119665707667897987,2265983192057928009,
 42485559978048128856,789743391503380249568]