Number of (n+1) X (1+1) 0..2 arrays with the upper median plus the lower median of every 2 X 2 subblock equal.
A236739
Number of (n+1) X (1+1) 0..2 arrays with the upper median plus the lower median of every 2 X 2 subblock equal.
Terms
- a(0) =81a(1) =267a(2) =833a(3) =2907a(4) =10233a(5) =37467a(6) =139201a(7) =526395a(8) =2012217a(9) =7766523a(10) =30188609a(11) =118025307a(12) =463513593a(13) =1826935707a(14) =7221598657a(15) =28611883131a(16) =113569804473a(17) =451466339643
External references
- oeis: A236739