Triangle T(n,k) read by rows: Number of traceless binary n X n matrices with all row and column sums equal to k, 1<=k<=n.

A364068

Triangle T(n,k) read by rows: Number of traceless binary n X n matrices with all row and column sums equal to k, 1<=k<=n.

Terms

    a(0) =0a(1) =1a(2) =0a(3) =2a(4) =1a(5) =0a(6) =9a(7) =9a(8) =1a(9) =0a(10) =44a(11) =216a(12) =44a(13) =1a(14) =0a(15) =265a(16) =7570a(17) =7570a(18) =265a(19) =1a(20) =0a(21) =1854a(22) =357435a(23) =1975560a(24) =357435a(25) =1854a(26) =1a(27) =0a(28) =14833a(29) =22040361

External references