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A243247 as a simple table

na(n)
10
20
30
40
510
678
7755
810709
9259123
1011703831
111006591916
12164058548700
1350335887082115

[0,0,0,0,10,78,755,10709,259123,11703831,
 1006591916,164058548700,50335887082115]