Number of (n+1) X (2+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.

A235878

Number of (n+1) X (2+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.

Terms

    a(0) =51a(1) =105a(2) =231a(3) =537a(4) =1311a(5) =3345a(6) =8871a(7) =24297a(8) =68271a(9) =195585a(10) =568311a(11) =1668057a(12) =4930431a(13) =14643825a(14) =43636551a(15) =130319817a(16) =389779791a(17) =1166980065a(18) =3496221591a(19) =10479227577a(20) =31418808351a(21) =94218676305a(22) =282580531431a(23) =847590599337

External references