Number of (n+1)X(6+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251053
Number of (n+1)X(6+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =12858a(1) =56676a(2) =114512a(3) =262200a(4) =521785a(5) =1081183a(6) =2129846a(7) =4324677a(8) =8753870a(9) =18288333a(10) =38813329a(11) =84501947a(12) =186769920a(13) =419036143a(14) =948331795a(15) =2161174028a(16) =4944248898a(17) =11342696102a(18) =26060422110a(19) =59935245973a(20) =137914961855
External references
- oeis: A251053