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A053431 Numbers k such that (Pi/2)*k^2*sin(1/k) < floor(Pi*k/2). 0
78256779, 340262731, 1963319607, 13402974518, 26805949036, 40208923554, 5703436923116, 136308121570117, 272616243140234, 1684937174853026414, 3369874349706052828, 5054811524559079242, 75474011359728834791267, 909474452321624805685313, 1818948904643249611370626 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The solution uses sequence A001203, the continued fraction expansion of Pi. - T. D. Noe, Mar 13 2014
LINKS
Michael A. Filaseta, Allen Stenger, D. Callan and Z. Franco, Solution to Problem 10640: When a Multiple of Pi/2 is Close to an Integer, Amer. Math. Monthly, 107 (2000), 177-178.
CROSSREFS
Cf. A001203.
Sequence in context: A109178 A178556 A251174 * A179578 A186598 A306407
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 21 2000
EXTENSIONS
More terms from Antreas P. Hatzipolakis (xpolakis(AT)otenet.gr), May 25 2000
Better name from T. D. Noe, Mar 13 2014
More terms from Sean A. Irvine, Dec 23 2021
STATUS
approved

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Last modified May 30 04:46 EDT 2024. Contains 372958 sequences. (Running on oeis4.)