Number of nX2 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

A278408

Number of nX2 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

Terms

    a(0) =0a(1) =20a(2) =264a(3) =2550a(4) =22267a(5) =166762a(6) =1046418a(7) =5586207a(8) =25997719a(9) =107862842a(10) =406276442a(11) =1409360487a(12) =4554092377a(13) =13832291491a(14) =39781304005a(15) =108983918717a(16) =285829839116a(17) =720662237189

External references