Number of nX2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX2 array.
A217639
Number of nX2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX2 array.
Terms
- a(0) =3a(1) =9a(2) =27a(3) =91a(4) =293a(5) =959a(6) =3121a(7) =10171a(8) =33141a(9) =107985a(10) =351855a(11) =1146471a(12) =3735623a(13) =12172023a(14) =39660897a(15) =129229689a(16) =421077529a(17) =1372024391a(18) =4470556607a(19) =14566706329a(20) =47463649813a(21) =154653907527a(22) =503918919165
External references
- oeis: A217639