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A015622 as a simple table

na(n)
10
20
30
41
55
615
735
869
9125
10205
11325
12479
13699
14965
151325
161745
172305
182919
193735
204619
215739
226949
238489
2410061
2512081
2614161
2716705
2819343
2922619
3025819
3129879
3233919
3338759
3443655
3549615
3655325
3762465
3869419
3977635
4085771
4195651
42104895

[0,0,0,1,5,15,35,69,125,205,325,479,699,965,1325,
 1745,2305,2919,3735,4619,5739,6949,8489,10061,
 12081,14161,16705,19343,22619,25819,29879,33919,
 38759,43655,49615,55325,62465,69419,77635,85771,
 95651,104895]