Number of ways to tile a square of side 2n by dominoes (rectangles of size 2 X 1 or 1 X 2) is 2^n * a(n)^2 (see A004003).

A065072

Number of ways to tile a square of side 2n by dominoes (rectangles of size 2 X 1 or 1 X 2) is 2^n * a(n)^2 (see A004003).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =29a(4) =901a(5) =89893a(6) =28793575a(7) =29607089625

External references