Number of n X 1 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

A278365

Number of n X 1 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =6a(5) =77a(6) =504a(7) =2304a(8) =8350a(9) =25653a(10) =69576a(11) =171106a(12) =388752a(13) =827190a(14) =1665456a(15) =3198312a(16) =5895396a(17) =10483934a(18) =18062160a(19) =30252180a(20) =49402850a(21) =78855339a(22) =123286440a(23) =189147400a(24) =285219090a(25) =423307755a(26) =619109400a(27) =893275110a(28) =1272714300a(29) =1792178076

External references