T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

A278656

T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =24a(8) =24a(9) =0a(10) =6a(11) =1076a(12) =3626a(13) =1076a(14) =6a(15) =77a(16) =19893a(17) =210616a(18) =210616a(19) =19893a(20) =77a(21) =504a(22) =235446a(23) =6920404a(24) =20667190a(25) =6920404a(26) =235446a(27) =504a(28) =2304a(29) =2080575

External references