The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A178931 This sequence S is generated by the following rules: 2 is in S, and if n is in S, then floor[(3n-1)/2] and 3n are in S. 6
 2, 6, 8, 11, 16, 18, 23, 24, 26, 33, 34, 35, 38, 48, 49, 50, 52, 54, 56, 69, 71, 72, 73, 74, 77, 78, 80, 83, 99, 102, 103, 105, 106, 107, 109, 110, 114, 115, 116, 119, 124, 144, 147, 148, 150, 152, 154, 156, 157, 158, 160, 162, 163, 164, 168, 170, 172, 173, 178, 185 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence results from flattening and sorting the tree at A183212. Complement of A183213, obtained from the tree at A183211. Sequence A117943 is the characteristic sequence of this one. - M. F. Hasler, Mar 07 2015 LINKS Ivan Neretin, Table of n, a(n) for n = 1..10000 FORMULA (See the Mathematica code.) MATHEMATICA nn=200; t={2}; t0=t; While[t=Select[Union[t, Floor[(3*t-1)/2], 3*t], #<=nn &]; t0 != t, t0=t]; t CROSSREFS Cf. A183213, A183212. Sequence in context: A184420 A136496 A183173 * A243184 A076991 A130205 Adjacent sequences: A178928 A178929 A178930 * A178932 A178933 A178934 KEYWORD nonn AUTHOR Clark Kimberling, Dec 30 2010 STATUS approved

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

Last modified April 18 03:33 EDT 2024. Contains 371767 sequences. (Running on oeis4.)