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A075870 as a simple table

na(n)
12
210
358
4338
51970
611482
766922
8390050
92273378
1013250218
1177227930
12450117362
132623476242
1415290740090
1589120964298
16519435045698
173027489309890
1817645500813642
19102845515571962
20599427592618130
213493720040136818
2220362892648202778
23118683635849079850

[2,10,58,338,1970,11482,66922,390050,2273378,
 13250218,77227930,450117362,2623476242,
 15290740090,89120964298,519435045698,
 3027489309890,17645500813642,102845515571962,
 599427592618130,3493720040136818,
 20362892648202778,118683635849079850]