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A081621 as a simple table

na(n)
40
50
60
70
80
90
100
110
121
130
141
151
163
174
1812
1923
2073
21192
22651
232070
247290
2525381
2691441
27329824
281204737
294412031
3016248772
3159995535
32222231424
33825028656
343069993552
3511446245342
3642758608761
37160012226334
38599822851579
392252137171764
408469193859271
4131896058068930

[0,0,0,0,0,0,0,0,1,0,1,1,3,4,12,23,73,192,651,
 2070,7290,25381,91441,329824,1204737,4412031,
 16248772,59995535,222231424,825028656,3069993552,
 11446245342,42758608761,160012226334,599822851579,
 2252137171764,8469193859271,31896058068930]