Irrational parts of circle radii in nested circles and hexagons (see comment).

A255163

Irrational parts of circle radii in nested circles and hexagons (see comment).

Terms

    a(0) =1a(1) =2a(2) =-12a(3) =168a(4) =-2160a(5) =27936a(6) =-361152a(7) =4669056a(8) =-60362496a(9) =780378624a(10) =-10088893440a(11) =130431264768

External references