This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A062186 a(n) = a(n-1) - a(floor(n/2)), with a(1)=1. 2
 1, 0, -1, -1, -1, 0, 1, 2, 3, 4, 5, 5, 5, 4, 3, 1, -1, -4, -7, -11, -15, -20, -25, -30, -35, -40, -45, -49, -53, -56, -59, -60, -61, -60, -59, -55, -51, -44, -37, -26, -15, 0, 15, 35, 55, 80, 105, 135, 165, 200, 235, 275, 315, 360, 405, 454, 503, 556, 609, 665, 721, 780, 839, 899, 959, 1020, 1081, 1141, 1201, 1260 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS Period of oscillations above and below the axis more than doubles at each cycle. LINKS FORMULA G.f.: A(x) satisfies: A(x) = (x - (1 + x)*A(x^2))/(1 - x). - Ilya Gutkovskiy, May 04 2019 EXAMPLE a(14)=a(13)-a(7)=5-1=4. a(15)=a(14)-a(7)=4-1=3. CROSSREFS Cf. A033485, A062187, A062188. Sequence in context: A234470 A113771 A131845 * A085763 A273264 A281826 Adjacent sequences:  A062183 A062184 A062185 * A062187 A062188 A062189 KEYWORD sign AUTHOR Henry Bottomley, Jun 13 2001 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 September 21 00:17 EDT 2019. Contains 327252 sequences. (Running on oeis4.)