Number of curved edges among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3*n points placed on the sides of an equilateral triangle when every pair of the 3 + 3*n points are connected by a circle and where the points lie at the ends of the circle's diameter.

A372733

Number of curved edges among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3*n points placed on the sides of an equilateral triangle when every pair of the 3 + 3*n points are connected by a circle and where the points lie at the ends of the circle's diameter.

Terms

    a(0) =12a(1) =138a(2) =738a(3) =2838a(4) =7194a(5) =17904a(6) =33954a(7) =62868a(8) =103866a(9) =167280a(10) =248826a(11) =370458a(12) =511806a(13) =715905a(14) =952608a(15) =1260366

External references