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A051563 as a simple table

n a(n)
0 0
1 0
2 1
3 30
4 659
5 13145
6 255424
7 4985316
8 99236556
9 2030997852
10 42924478536
11 938984014584
12 21283428847680
13 500043968498880
14 12176238355176960
15 307176581692097280
16 8023946251816984320
17 216880826334455750400

[0,0,1,30,659,13145,255424,4985316,99236556,
 2030997852,42924478536,938984014584,
 21283428847680,500043968498880,12176238355176960,
 307176581692097280,8023946251816984320,
 216880826334455750400]

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Last modified February 28 23:19 EST 2020. Contains 332353 sequences. (Running on oeis4.)