Number of simple squared rectangles of order n up to symmetry.

A220167

Number of simple squared rectangles of order n up to symmetry.

Terms

    a(0) =3a(1) =6a(2) =22a(3) =76a(4) =247a(5) =848a(6) =2892a(7) =9969a(8) =34455a(9) =119894a(10) =420582a(11) =1482874a(12) =5254954a(13) =18714432a(14) =66969859a(15) =240739417

External references