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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
2, 3, 4, 5, 6, 6, 7, 8, 9 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 17 07:51 EDT 2021. Contains 347478 sequences. (Running on oeis4.)