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A255374 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 18
6 261
7 3420
8 42300
9 503991
10 5849757
11 66595383
12 746925399
13 8278904070
14 90884885481
15 989800742916
16 10707460718526
17 115168484215116
18 1232617054343121
19 13135427089598511
20 139446180653268195
21 1475374347592901460
22 15562803326717545290

[0,0,0,0,1,18,261,3420,42300,503991,5849757,
 66595383,746925399,8278904070,90884885481,
 989800742916,10707460718526,115168484215116,
 1232617054343121,13135427089598511,
 139446180653268195,1475374347592901460,
 15562803326717545290]

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)