Number of triangles in the complex obtained by starting with an isosceles right triangle, and dividing each cell into two similar isosceles right triangles n times.

A249753

Number of triangles in the complex obtained by starting with an isosceles right triangle, and dividing each cell into two similar isosceles right triangles n times.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =17a(4) =40a(5) =99a(6) =246a(7) =642a(8) =1690a(9) =4554a(10) =12436a(11) =34132a(12) =95230a(13) =263934a(14) =744956a(15) =2075132a(16) =5892430a(17) =16456014a(18) =46871196a(19) =131068572a(20) =373897870a(21) =1046231694a(22) =2986898716a(23) =8360588572a(24) =23878057870a(25) =66847653774a(26) =190955945756a(27) =534633021212

External references