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A036381 as a simple table

na(n)
10
20
30
41
50
65
78
821
942
1089
11180
12361
13720
141438
152867
165696
1711282
1822392
1944340
2087887
21174045
22344719
23682767
241352375
252678305
265305631
2710510870
2820824910
2941264654
3081776998
31162083352
32321295873

[0,0,0,1,0,5,8,21,42,89,180,361,720,1438,2867,
 5696,11282,22392,44340,87887,174045,344719,682767,
 1352375,2678305,5305631,10510870,20824910,
 41264654,81776998,162083352,321295873]