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A036464 as a simple table

na(n)
10
20
38
444
5140
6340
7700
81288
92184
103480
115280
127700
1310868
1414924
1520020
1626320
1734000
1843248
1954264
2067260
2182460
22100100
23120428
24143704
25170200
26200200
27234000
28271908
29314244
30361340
31413540
32471200
33534688
34604384

[0,0,8,44,140,340,700,1288,2184,3480,5280,7700,
 10868,14924,20020,26320,34000,43248,54264,67260,
 82460,100100,120428,143704,170200,200200,234000,
 271908,314244,361340,413540,471200,534688,604384]