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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
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
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
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