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A241203 a(n) = floor(5^n/4^(n-1)). 1
5, 6, 7, 9, 12, 15, 19, 23, 29, 37, 46, 58, 72, 90, 113, 142, 177, 222, 277, 346, 433, 542, 677, 847, 1058, 1323, 1654, 2067, 2584, 3231, 4038, 5048, 6310, 7888, 9860, 12325, 15407, 19259, 24074, 30092, 37615, 47019, 58774, 73468, 91835, 114794, 143492, 179366, 224207, 280259 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) is the curvature (rounded down) of circles inscribed in minor segment where chord length equal to sagitta length starting from a unit circle, the next iterations are nested down at scale factor 4/5. The curvature of circles inscribed in major segment would be A065565: floor((5/4)^n). See illustrations.

LINKS

Table of n, a(n) for n=1..50.

Kival Ngaokrajang, Illustrations of initial terms

FORMULA

a(n) = floor(5^n/4^(n-1)), n >= 1.

PROG

(PARI){for (n=1, 100, print1(floor(5^n/4^(n-1)), ", "))}

CROSSREFS

Cf. A065565.

Sequence in context: A229231 A073419 A072956 * A279001 A080708 A047576

Adjacent sequences:  A241200 A241201 A241202 * A241204 A241205 A241206

KEYWORD

nonn,easy

AUTHOR

Kival Ngaokrajang, Aug 08 2014

STATUS

approved

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Last modified June 28 21:04 EDT 2022. Contains 354907 sequences. (Running on oeis4.)