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A056350 as a simple table

n a(n)
1 0
2 0
3 0
4 3
5 24
6 136
7 612
8 2616
9 10480
10 41364
11 159780
12 613919
13 2341920
14 8919204
15 33905164
16 128904660
17 490213680
18 1866117224
19 7111777860
20 27140327757
21 103721217388
22 396974621676
23 1521577377012
24 5840546872280

[0,0,0,3,24,136,612,2616,10480,41364,159780,
 613919,2341920,8919204,33905164,128904660,
 490213680,1866117224,7111777860,27140327757,
 103721217388,396974621676,1521577377012,
 5840546872280]

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Last modified August 13 19:30 EDT 2020. Contains 336451 sequences. (Running on oeis4.)