

A121604


Numbers k such that the radius of the smallest circle into which A121603(m) unit circles can be packed is 1 + csc(Pi/k).


1




OFFSET

0,1


COMMENTS

From the diagrams in the link it appears likely that 10,12,12 are the next three terms.


LINKS

Table of n, a(n) for n=0..8.
E. Friedman, Erich's Packing Center: "Circles in Circles"


EXAMPLE

See A121602 for the case a(8) = 9 pertaining to A121603(8) = 11 unit circles.


CROSSREFS

Cf. A121603, A121570, A121598, A121601, A121602.
Sequence in context: A086419 A287354 A025548 * A071520 A195918 A176842
Adjacent sequences: A121601 A121602 A121603 * A121605 A121606 A121607


KEYWORD

nonn


AUTHOR

Rick L. Shepherd, Aug 09 2006


STATUS

approved



