Number of tilings of a 5 X n rectangle using n pentominoes of shapes I, N, P, U, T.

A247103

Number of tilings of a 5 X n rectangle using n pentominoes of shapes I, N, P, U, T.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =11a(4) =33a(5) =166a(6) =589a(7) =2216a(8) =8935a(9) =33984a(10) =137056a(11) =539085a(12) =2100341a(13) =8324716a(14) =32607928a(15) =128652672a(16) =507032667a(17) =1992083368a(18) =7853132654a(19) =30894420646a(20) =121642017784a(21) =479048967517

External references