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

A246764

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

Terms

    a(0) =1a(1) =1a(2) =3a(3) =7a(4) =17a(5) =78a(6) =247a(7) =916a(8) =3301a(9) =11272a(10) =41854a(11) =150485a(12) =538585a(13) =1954912a(14) =6978464a(15) =25170446a(16) =90851829a(17) =326048198a(18) =1176355862a(19) =4230352602a(20) =15222263126a(21) =54855015353a(22) =197302183497a(23) =710556528403

External references