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_zx + 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, 293, 3605, 52327, 899311, 1801901
4 seqfan posts
Fri Jan 20 11:18:59 CET 2012 [seqfan] Re: seq needed of (0,+-1) matrices
Thu Jan 19 23:19:36 CET 2012 [seqfan] Re: seq needed of (0,+-1) matrices
Thu Jan 19 22:51:19 CET 2012 [seqfan] Re: seq needed of (0,+-1) matrices
Thu Jan 19 22:41:46 CET 2012 [seqfan] Re: seq needed of (0,+-1) matrices
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
Links to OEIS content are included according to
The OEIS End-User License Agreement
.