This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A121502 Companion sequence for A121501 used in a unit circle area approximation problem. 2
 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 22, 27, 34, 46, 58, 63, 70, 75, 87, 128, 157, 198 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The pairs (n(k),m(k)):=(A121501(k),a(k)), k>=1, lead to a strictly decreasing sequence of relative errors E(n(k),m(k)) in the circle area approximation problem described in A121500. For each k=1,2,... the unit circle has inscribed n(k)-gon and circumscribed m(k)-gon. For the sequence of relative errors E(n(k),m(k)), k=1..20 see the W. Lang link in A121501. LINKS FORMULA a(k)= A121500(A121501(k)),k>=1. EXAMPLE (n(k),m(k)) pairs (A121501(k),a(k)), k=1..7: [3, 3], [5, 4], [6, 5], [8, 6], [11, 8], [14, 10], [15, 11],... CROSSREFS Sequence in context: A098171 A039031 A047309 * A180644 A202110 A267858 Adjacent sequences:  A121499 A121500 A121501 * A121503 A121504 A121505 KEYWORD nonn,more AUTHOR Wolfdieter Lang, Aug 16 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 18 10:35 EDT 2019. Contains 322209 sequences. (Running on oeis4.)