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A246730 Decimal expansion of r_9, the 9th smallest radius < 1 for which a compact packing of the plane exists, with disks of radius 1 and r_9. 7
6, 3, 7, 5, 5, 5, 9, 7, 7, 2, 3, 1, 9, 4, 5, 7, 9, 3, 4, 9, 1, 3, 1, 7, 1, 6, 7, 7, 3, 9, 9, 0, 9, 5, 9, 6, 7, 3, 7, 5, 7, 0, 8, 4, 2, 4, 5, 7, 4, 0, 1, 8, 7, 4, 0, 6, 7, 0, 8, 5, 4, 5, 6, 5, 6, 7, 3, 3, 1, 8, 1, 1, 5, 9, 9, 4, 0, 6, 8, 7, 3, 7, 5, 7, 5, 0, 4, 1, 7, 1, 6, 6, 0, 0, 7, 3, 3, 3, 7, 7, 4, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
First root of x^4 - 10x^2 - 8x + 9.
EXAMPLE
0.637555977231945793491317167739909596737570842457401874067...
MATHEMATICA
RealDigits[Root[x^4 - 10x^2 - 8x + 9, x, 1], 10, 102] // First
CROSSREFS
Cf. A246723 (r_1), A246724 (r_2), A246725 (r_3), A246726 (r_4), A246727 (r_5), A002193 (r_6 = sqrt(2)-1), A246728 (r_7), A246729 (r_8).
Sequence in context: A182549 A260660 A011191 * A200239 A097676 A251780
KEYWORD
nonn,cons,easy
AUTHOR
STATUS
approved

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Last modified April 14 16:33 EDT 2024. Contains 371666 sequences. (Running on oeis4.)