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A093976 as a simple table

na(n)
10
20
30
40
55
6202
72779
834881
9389634
104106969
1141731672
12414087760
134043811134
1439077574251
15374986732902
163581487844657
1734101194196910
18324058813028738

[0,0,0,0,5,202,2779,34881,389634,4106969,41731672,
 414087760,4043811134,39077574251,374986732902,
 3581487844657,34101194196910,324058813028738]