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A211960 as a simple table

na(n)
10
20
365
43146
564705
6695587
74904333
825825865
9109813056
10396433235
111257315972
123589635788
139392825390

[0,0,65,3146,64705,695587,4904333,25825865,
 109813056,396433235,1257315972,3589635788,
 9392825390]