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A307125 as a simple table

na(n)
00
11
22
34
417
5123
61052
710568
8125750
91726189
1026730394
11460982300
128766443952
13182229703043
144110207945794
1599970680376908
162608221938476016
1772656914458625593
182152355976206481570
1967562405794276542004
202240111797037473955984
2178229640115171735522015
222870092624821982184377202

[0,1,2,4,17,123,1052,10568,125750,1726189,
 26730394,460982300,8766443952,182229703043,
 4110207945794,99970680376908,2608221938476016,
 72656914458625593,2152355976206481570,
 67562405794276542004,2240111797037473955984,
 78229640115171735522015,2870092624821982184377202]