Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222900
Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =1a(1) =4a(2) =14a(3) =75a(4) =411a(5) =2522a(6) =15919a(7) =103627a(8) =683480a(9) =4554799a(10) =30542304a(11) =205785953a(12) =1391485044a(13) =9436529666a(14) =64150640719a(15) =437015936703
External references
- oeis: A222900