Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
A253521
Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
Terms
- a(0) =42669a(1) =169828a(2) =256914a(3) =370028a(4) =673229a(5) =1439791a(6) =3429207a(7) =8936967a(8) =24799705a(9) =71469938a(10) =210239277a(11) =624906937a(12) =1866784570a(13) =5589710182a(14) =16755089278a(15) =50247017691a(16) =150717649463a(17) =452123299882
External references
- oeis: A253521