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A028541 as a simple table

n a(n)
0 1
1 0
2 0
3 7176
4 36405
5 451152
6 1850520
7 11430360
8 40829508
9 180254320
10 578006136
11 2083510440
12 6126245505
13 19249667568
14 52694220240
15 149784377808
16 386132988195
17 1016209016640
18 2489040955848
19 6159593155680
20 14435004725811
21 33958887040560
22 76572044994960

[1,0,0,7176,36405,451152,1850520,11430360,
 40829508,180254320,578006136,2083510440,
 6126245505,19249667568,52694220240,149784377808,
 386132988195,1016209016640,2489040955848,
 6159593155680,14435004725811,33958887040560,
 76572044994960]

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Last modified August 8 14:59 EDT 2022. Contains 356009 sequences. (Running on oeis4.)