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A051921
as a simple table
n
a(n)
0
1
1
1
2
3
3
16
4
131
5
1496
6
22482
7
426833
8
9934563
9
277006192
10
9085194458
[1,1,3,16,131,1496,22482,426833,9934563,277006192, 9085194458]