References to A238329

Number of skew-symmetric n X n matrices A = (a_ij) with entries from {-1,0,+1} such that a_wx a_yz + a_wy a_xz + a_wz a_xy = a_wx a_wy a_wz a_xy a_xz a_yz for all distinct w,x,y,z in {1..n}.
1, 3, 27, 125, 461, 1583, 5335, 17881, 59641, 197691, 650739, 2127381, 691085


1 seqfan posts

Mon Jan 26 13:39:53 CET 2009    [seqfan] Re: from Steven Finch about A087687

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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