Number of different triangles, squares and rectangles created when a square piece of paper is folded n times, the first time by a diagonal of the square and after by the median of the triangle.

A096260

Number of different triangles, squares and rectangles created when a square piece of paper is folded n times, the first time by a diagonal of the square and after by the median of the triangle.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =25a(4) =62a(5) =205a(6) =534a(7) =2110a(8) =5844a(9) =25996a(10) =75592a(11) =359256a(12) =1080592a(13) =5314480a(14) =16315424a(15) =81638240a(16) =253481024a(17) =1279358656a(18) =3996074112a(19) =20256075136a(20) =63463817472a(21) =322392513280

External references