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A210926 as a simple table

na(n)
10
21
34
495
59220
63055073
73000338892
88812917082915
976878364475257062
101995945343880703817038
11154116672749530867319434810

[0,1,4,95,9220,3055073,3000338892,8812917082915,
 76878364475257062,1995945343880703817038,
 154116672749530867319434810]