T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors.
A198642
T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors.
Terms
- a(0) =4a(1) =36a(2) =36a(3) =376a(4) =2436a(5) =376a(6) =3936a(7) =162776a(8) =162776a(9) =3936a(10) =41216a(11) =10937316a(12) =70145916a(13) =10937316a(14) =41216a(15) =431616a(16) =734979136a(17) =30189380016a(18) =30189380016a(19) =734979136a(20) =431616a(21) =4519936a(22) =49393306556
External references
- oeis: A198642