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A117778 as a simple table

na(n)
12
21
33
40
510
60
729
80
997
100
11293
120
13982
140
153385
160
1711631
180
1941375
200
21152900
220
23541525
240
251996031
260
277463249
280
2927801721
300
31102404054
320

[2,1,3,0,10,0,29,0,97,0,293,0,982,0,3385,0,11631,
 0,41375,0,152900,0,541525,0,1996031,0,7463249,0,
 27801721,0,102404054,0]