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 A088030 Smallest k such that k^3 -1 is a squarefree number with n prime divisors. a(n) = A088029(n)^(1/3). 1
 2, 3, 15, 11, 87, 291, 1296, 3446, 7991, 91971, 106031, 1721591, 10625871, 53983491, 327917591, 1329773831 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(17) > 4*10^9. - Giovanni Resta, Nov 06 2012 LINKS Table of n, a(n) for n=1..16. EXAMPLE a(4) = 11, 11^3 -1 = 2*5*7*19. CROSSREFS Cf. A088029. Sequence in context: A082572 A075244 A342567 * A101047 A251618 A309765 Adjacent sequences: A088027 A088028 A088029 * A088031 A088032 A088033 KEYWORD more,nonn AUTHOR Amarnath Murthy, Sep 19 2003 EXTENSIONS More terms from Ray Chandler, Oct 04 2003 2 more terms from Lambert Herrgesell (zero815(AT)googlemail.com), Feb 20 2008 a(14)-a(16) from Giovanni Resta, Nov 06 2012 STATUS approved

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Last modified August 13 12:15 EDT 2024. Contains 375139 sequences. (Running on oeis4.)