Given a circle of radius R into which small circles of radius R/2^n are packed in a "hexagonal pattern" (see Comments), a(n) is the maximum number of small circles.
A239073
Given a circle of radius R into which small circles of radius R/2^n are packed in a "hexagonal pattern" (see Comments), a(n) is the maximum number of small circles.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =48a(4) =208a(5) =874a(6) =3600a(7) =14622a(8) =58976a(9) =236824a(10) =949094a(11) =3800126a(12) =15207812a(13) =60846154a(14) =243414326a(15) =973716670a(16) =3894985588a(17) =15580180122a(18) =62321195992a(19) =249285735518a(20) =997144844044
External references
- oeis: A239073