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A201244 as a simple table

na(n)
10
20
338
4340
51630
65552
715210
835828
975530
10146240
11264702
12453620
13742918
141171120
151786850
162650452
173835730
185431808
197545110
2010301460
2113848302
2218357040
2324025498
2431080500
2539780570
2650418752
2763325550
2878871988
2997472790
30119589680
31145734802

[0,0,38,340,1630,5552,15210,35828,75530,146240,
 264702,453620,742918,1171120,1786850,2650452,
 3835730,5431808,7545110,10301460,13848302,
 18357040,24025498,31080500,39780570,50418752,
 63325550,78871988,97472790,119589680,145734802]