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A180992 as a simple table

n a(n)
1 0
2 0
3 6
4 873
5 194176
6 91610331
7 106664349231
8 337206602197275
9 3097011674559184126
10 86891156143807447975507
11 7735857823114195427126194239
12 2249860503567334385742963521466736

[0,0,6,873,194176,91610331,106664349231,
 337206602197275,3097011674559184126,
 86891156143807447975507,
 7735857823114195427126194239,
 2249860503567334385742963521466736]

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Last modified October 15 07:56 EDT 2019. Contains 328026 sequences. (Running on oeis4.)