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A318986 as a simple table

na(n)
00
10
20
30
40
55
6107
723745
8106228844
99365022303538
1020890436195945769615
111478157455158044452849321015

[0,0,0,0,0,5,107,23745,106228844,9365022303538,
 20890436195945769615,1478157455158044452849321015]