Number of free poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.

A197156

Number of free poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.

Terms

    a(0) =1a(1) =3a(2) =5a(3) =20a(4) =56a(5) =225a(6) =819a(7) =3333a(8) =13336a(9) =55231a(10) =229146a(11) =963284a(12) =4068503a(13) =17301000a(14) =73893082a(15) =317013121a(16) =1364917667a(17) =5896350458a(18) =25545737979a(19) =110968732581

External references