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A056284 as a simple table

n a(n)
1 0
2 0
3 0
4 6
5 48
6 260
7 1200
8 5106
9 20720
10 81876
11 318000
12 1223136
13 4675440
14 17815020
15 67769552
16 257700906
17 980240880
18 3731753180
19 14222737200
20 54278580036
21 207438938000
22 793940475900
23 3043140078000
24 11681057249536
25 44900438149296
26 172824331826580
27 666070256489680

[0,0,0,6,48,260,1200,5106,20720,81876,318000,
 1223136,4675440,17815020,67769552,257700906,
 980240880,3731753180,14222737200,54278580036,
 207438938000,793940475900,3043140078000,
 11681057249536,44900438149296,172824331826580,
 666070256489680]

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)