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A027630 as a simple table

na(n)
01
115
2135
3870
43992
514142
641400
7104870
8237288
9490654
10942888
111705510
122932344
134829246
147664856
1511782374
1617612360
1725686558
1836652744
1951290598
2070528600
2195461950
22127371512
23167743782
24218291880
25280977566
26358034280
27451991206
28565698360

[1,15,135,870,3992,14142,41400,104870,237288,
 490654,942888,1705510,2932344,4829246,7664856,
 11782374,17612360,25686558,36652744,51290598,
 70528600,95461950,127371512,167743782,218291880,
 280977566,358034280,451991206,565698360]