A121604 - OEIS

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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).

2, 3, 4, 5, 6, 6, 7, 8, 9 (list; graph; refs; listen; history; 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	`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: A195879 A086419 A025548 * A071520 A195918 A176842` `Adjacent sequences: A121601 A121602 A121603 * A121605 A121606 A121607`
	KEYWORD	`nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 09 2006`

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Last modified February 14 19:37 EST 2012. Contains 205663 sequences.