T(n,k)=Number of nXk 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
A278414
T(n,k)=Number of nXk 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =20a(5) =1a(6) =15a(7) =264a(8) =264a(9) =15a(10) =90a(11) =2550a(12) =9354a(13) =2550a(14) =90a(15) =357a(16) =22267a(17) =201539a(18) =201539a(19) =22267a(20) =357a(21) =1107a(22) =166762a(23) =3576730a(24) =11454780a(25) =3576730a(26) =166762a(27) =1107a(28) =2907a(29) =1046418
External references
- oeis: A278414