CAPat logo www.capat.org  
Number of Circles Around Centre Circle ( n ) =
r0 x0 y0 COL
r1 x1 y1 COL  
r2 x2 y2 COL A1-2 Atot.
r3 x3 y3 COL A2-3 Atot.
r4 x4 y4 COL A3-4 Atot.
r5 x5 y5 COL A4-5 Atot.
r6 x6 y6 COL A5-6 Atot.
r7 x7 y7 COL A6-7 Atot.
r8 x8 y8 COL A7-8 Atot.
r9 x9 y9 COL A8-9 Atot.
        An-1 Atot.