a(n) is the number of 2 X 1 domino tilings of the set S in the plane R^2 consisting of the union of the following two rectangles: rectangle1: |x| <= n, |y| <= 1, rectangle2: |x| <= 1, |y| <= n.
A060635
a(n) is the number of 2 X 1 domino tilings of the set S in the plane R^2 consisting of the union of the following two rectangles: rectangle1: |x| <= n, |y| <= 1, rectangle2: |x| <= 1, |y| <= n.
Terms
- a(0) =2a(1) =8a(2) =72a(3) =450a(4) =3200a(5) =21632a(6) =149058a(7) =1019592a(8) =6993800a(9) =47922050a(10) =328499712a(11) =2251473408a(12) =15432082562a(13) =105772401800a(14) =724976569800
External references
- oeis: A060635