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A201157 as a simple table

na(n)
10
25
315
440
5105
6275
7720
81885
94935
1012920
1133825
1288555
13231840
14606965
151589055
164160200
1710891545
1828514435
1974651760
20195440845
21511670775
221339571480
233507043665
249181559515
2524037634880
2662931345125
27164756400495
28431337856360
291129257168585

[0,5,15,40,105,275,720,1885,4935,12920,33825,
 88555,231840,606965,1589055,4160200,10891545,
 28514435,74651760,195440845,511670775,1339571480,
 3507043665,9181559515,24037634880,62931345125,
 164756400495,431337856360,1129257168585]