Number of (n+1)X(1+1) 0..3 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
A237967
Number of (n+1)X(1+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) =256a(1) =1494a(2) =7905a(3) =40442a(4) =208210a(5) =1074202a(6) =5540337a(7) =28475040a(8) =146747184a(9) =755218808a(10) =3893371264a(11) =20027524168a(12) =103232219796a(13) =531114565248
External references
- oeis: A237967