T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

A278798

T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =4a(4) =44a(5) =4a(6) =65a(7) =1713a(8) =1713a(9) =65a(10) =456a(11) =34348a(12) =145208a(13) =34348a(14) =456a(15) =2128a(16) =468496a(17) =7196852a(18) =7196852a(19) =468496a(20) =2128a(21) =7728a(22) =4888659a(23) =263134490a(24) =1038462658a(25) =263134490a(26) =4888659a(27) =7728a(28) =23607a(29) =41698446

External references