Number of n X 2 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.
A278303
Number of n X 2 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.
Terms
- a(0) =3a(1) =32a(2) =294a(3) =2089a(4) =11486a(5) =51562a(6) =197981a(7) =672365a(8) =2068221a(9) =5862308a(10) =15508725a(11) =38669253a(12) =91572377a(13) =207221995a(14) =450353206a(15) =943885459a(16) =1914477373a(17) =3769095759a(18) =7220896420a(19) =13492019950a(20) =24634260906a(21) =44027466111a(22) =77141909955a(23) =132687309790
External references
- oeis: A278303