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A142999 as a simple table

n a(n)
0 0
1 1
2 3
3 31
4 460
5 12076
6 420336
7 21114864
8 1325949696
9 109027627776
10 10771080883200
11 1316468976307200
12 187978181665996800
13 31997755234356019200
14 6232784237890147123200
15 1409976507981835100160000
16 359243973790625586216960000
17 104259271562188189469245440000

[0,1,3,31,460,12076,420336,21114864,1325949696,
 109027627776,10771080883200,1316468976307200,
 187978181665996800,31997755234356019200,
 6232784237890147123200,1409976507981835100160000,
 359243973790625586216960000,
 104259271562188189469245440000]

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Last modified March 29 08:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)