login

A266395 as a simple table

na(n)
10
20
30
40
515
675
7225
8525
91050
101890
113150
124950
137425
1410725
1515015
1620475
1727300
1835700
1945900
2058140
2172675
2289775
23109725
24132825
25159390
26189750
27224250
28263250
29307125
30356265
31411075
32471975
33539400
34613800
35695640
36785400
37883575
38990675
391107225

[0,0,0,0,15,75,225,525,1050,1890,3150,4950,7425,
 10725,15015,20475,27300,35700,45900,58140,72675,
 89775,109725,132825,159390,189750,224250,263250,
 307125,356265,411075,471975,539400,613800,695640,
 785400,883575,990675,1107225]