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A004308 as a simple table

n a(n)
4 0
5 0
6 24
7 154
8 1664
9 15984
10 173000
11 2004486
12 25086336
13 337215372
14 4852472744
15 74473953570
16 1214929163904
17 21000334935308
18 383498204201496
19 7379028867234934
20 149233618755354240
21 3165087929247599208
22 70251457394397108280

[0,0,24,154,1664,15984,173000,2004486,25086336,
 337215372,4852472744,74473953570,1214929163904,
 21000334935308,383498204201496,7379028867234934,
 149233618755354240,3165087929247599208,
 70251457394397108280]

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Last modified May 14 07:57 EDT 2024. Contains 372530 sequences. (Running on oeis4.)