Number of (n+1)X(3+1) 0..3 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
A237969
Number of (n+1)X(3+1) 0..3 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =7905a(1) =59014a(2) =369068a(3) =2609908a(4) =20123780a(5) =149625960a(6) =1103412332a(7) =8201125448a(8) =61392928964a(9) =454158172752
External references
- oeis: A237969