Number of nX3 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

A278320

Number of nX3 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

Terms

    a(0) =0a(1) =20a(2) =236a(3) =1678a(4) =9714a(5) =51229a(6) =251892a(7) =1144205a(8) =4762445a(9) =18164685a(10) =63838081a(11) =208288721a(12) =635843575a(13) =1829104046a(14) =4989647446a(15) =12978273537a(16) =32338548895a(17) =77506161543a(18) =179299342255a(19) =401569610694a(20) =873025241923

External references