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A307104 as a simple table

na(n)
10
20
32
43
56
657
7141
8390
98790
1082128
1111963
12793212
13835571
145054322
151661682
1675880433
1745322418
18619541169
19319375992
206745157241
213317093849
2266891312600
23843114912509
249837094694375
2516065496578813
2635901922360062
2767557477392256
28547721051611007

[0,0,2,3,6,57,141,390,8790,82128,11963,793212,
 835571,5054322,1661682,75880433,45322418,
 619541169,319375992,6745157241,3317093849,
 66891312600,843114912509,9837094694375,
 16065496578813,35901922360062,67557477392256,
 547721051611007]