a(n) is the number of vertices in the n-fold iterated barycentric subdivision of a triangle (or 2-simplex).
A380996
a(n) is the number of vertices in the n-fold iterated barycentric subdivision of a triangle (or 2-simplex).
Terms
- a(0) =3a(1) =7a(2) =25a(3) =121a(4) =673a(5) =3937a(6) =23425a(7) =140161a(8) =840193a(9) =5039617a(10) =30234625a(11) =181401601a(12) =1088397313a(13) =6530359297a(14) =39182106625a(15) =235092541441
External references
- oeis: A380996