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A287482 as a simple table

na(n)
10
20
30
40
51
68
770
8724
910975
10271378
1112152603
121029799448
13166102803505
1450667847301581

[0,0,0,0,1,8,70,724,10975,271378,12152603,
 1029799448,166102803505,50667847301581]