The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A121683 Untouchable cubes. 1
 216, 1728, 5832, 8000, 13824, 21952, 27000, 74088, 110592, 157464, 175616, 195112, 216000, 238328, 287496, 314432, 343000, 373248, 729000, 884736, 941192, 1061208, 1124864, 1259712, 1481544, 1728000, 2000376, 2097152, 2628072, 2744000, 2985984, 3241792, 3511808 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Untouchable numbers (cf. A005114) that are third powers (cf. A000578); a(1) to a(7) are the third powers of 6, 12, 18, 20, 24, 28, 30. LINKS Amiram Eldar, Table of n, a(n) for n = 1..45 EXAMPLE 216 = 6^3 = A000578(6) = A005114(13). CROSSREFS Intersection of A000578 and A005114. Cf. A111278 (untouchable squares). Sequence in context: A233974 A016863 A033698 * A016911 A370693 A323801 Adjacent sequences: A121680 A121681 A121682 * A121684 A121685 A121686 KEYWORD nonn AUTHOR Klaus Brockhaus, Aug 15 2006 EXTENSIONS a(8)-a(30) from Donovan Johnson, Jul 19 2008 Terms a(26)-a(30) corrected and a(31)-a(33) added by Amiram Eldar, Sep 23 2022 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 May 29 00:29 EDT 2024. Contains 372921 sequences. (Running on oeis4.)