This site is supported by donations to The OEIS Foundation.

 Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A086317 Decimal expansion of asymptotic constant xi for counts of weakly binary trees. 8
 2, 4, 8, 3, 2, 5, 3, 5, 3, 6, 1, 7, 2, 6, 3, 6, 8, 5, 8, 5, 6, 2, 2, 8, 8, 5, 1, 8, 1, 7, 8, 2, 2, 1, 2, 8, 9, 1, 8, 8, 6, 9, 7, 3, 4, 0, 8, 1, 4, 3, 6, 4, 5, 8, 5, 9, 2, 0, 2, 5, 9, 6, 9, 7, 3, 0, 6, 7, 4, 2, 5, 4, 0, 8, 8, 5, 8, 0, 9, 8, 3, 9, 0, 6, 4, 7, 6, 4, 0, 1, 6, 9, 1, 6, 7, 2, 1, 8, 2, 7, 4, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 Eric Weisstein's World of Mathematics, Weakly binary tree FORMULA 1/A240943. Equals lim n -> infinity A001190(n)^(1/n). - Vaclav Kotesovec, Jul 28 2014 EXAMPLE 2.48325353617263685856228851817822128918869734... MATHEMATICA digits = 102; c[0] = 2; c[n_] := c[n] = c[n - 1]^2 + 2; xi[n_Integer] := xi[n] = c[n]^(2^-n); xi[5]; xi[n = 10]; While[RealDigits[xi[n], 10, digits] != RealDigits[xi[n - 5], 10, digits], n = n + 5]; RealDigits[xi[n], 10, digits] // First (* Jean-François Alcover, May 27 2014 *) CROSSREFS Cf. A001190, A086318, A240943. Cf. A000672, A003214. Sequence in context: A167203 A263410 A285334 * A110217 A243062 A232645 Adjacent sequences:  A086314 A086315 A086316 * A086318 A086319 A086320 KEYWORD nonn,cons AUTHOR Eric W. Weisstein, Jul 15 2003 EXTENSIONS Typos corrected by Jean-François Alcover, May 27 2014 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 December 18 10:43 EST 2018. Contains 318219 sequences. (Running on oeis4.)