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A283660 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 4
6 40
7 264
8 1504
9 7936
10 39744
11 191552
12 896768
13 4103616
14 18434944
15 81563008
16 356264448
17 1539203584
18 6587355136
19 27960152064
20 117817262080
21 493257806848
22 2053204985856
23 8502296782848
24 35043025969152
25 143818367385600

[0,0,0,0,4,40,264,1504,7936,39744,191552,896768,
 4103616,18434944,81563008,356264448,1539203584,
 6587355136,27960152064,117817262080,493257806848,
 2053204985856,8502296782848,35043025969152,
 143818367385600]

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)