A162314 - OEIS

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A162314 as a simple table

n	a(n)
0	1
1	4
2	24
3	208
4	2400
5	34624
6	599424
7	12107008
8	279467520
9	7257355264
10	209403009024
11	6646303019008
12	230126121738240
13	8632047179874304
14	348695526455476224
15	15091839203924574208
16	696733490476660162560

[1,4,24,208,2400,34624,599424,12107008,279467520, 7257355264,209403009024,6646303019008, 230126121738240,8632047179874304, 348695526455476224,15091839203924574208, 696733490476660162560]