Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.
A278430
Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.
Terms
- a(0) =6a(1) =100a(2) =1609a(3) =19624a(4) =178352a(5) =1287838a(6) =7795151a(7) =41058743a(8) =193149285a(9) =826734193a(10) =3264405727a(11) =12016477160a(12) =41579224479a(13) =136142690453a(14) =424140541353
External references
- oeis: A278430