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A172967 as a simple table

n a(n)
1 0
2 0
3 0
4 208
5 3210
6 58056
7 458157
8 2524176
9 10587591
10 36576380
11 109008735
12 289450344
13 700477401
14 1570789892
15 3304892985
16 6586928032
17 12530769343
18 22891446252

[0,0,0,208,3210,58056,458157,2524176,10587591,
 36576380,109008735,289450344,700477401,1570789892,
 3304892985,6586928032,12530769343,22891446252]

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Last modified November 22 13:47 EST 2019. Contains 329393 sequences. (Running on oeis4.)