Number of ways to dissect an equilateral triangle into n non-overlapping equilateral triangles counting isomorphisms only once.

A299705

Number of ways to dissect an equilateral triangle into n non-overlapping equilateral triangles counting isomorphisms only once.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =1a(4) =0a(5) =1a(6) =2a(7) =3a(8) =9a(9) =23a(10) =62a(11) =188a(12) =574a(13) =1826a(14) =5953a(15) =19664a(16) =66049a(17) =224700a(18) =771859a(19) =2674753

External references