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A283341 as a simple table

n a(n)
1 0
2 0
3 6
4 26
5 120
6 524
7 2174
8 8816
9 35036
10 137164
11 530660
12 2033212
13 7728080
14 29176258
15 109517952
16 409053414
17 1521210528
18 5635589250
19 20807397706
20 76591784712
21 281168155840
22 1029636092960
23 3762126788080
24 13718306165240
25 49929760704254

[0,0,6,26,120,524,2174,8816,35036,137164,530660,
 2033212,7728080,29176258,109517952,409053414,
 1521210528,5635589250,20807397706,76591784712,
 281168155840,1029636092960,3762126788080,
 13718306165240,49929760704254]

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Last modified June 8 13:28 EDT 2024. Contains 373217 sequences. (Running on oeis4.)