A088030 Smallest k such that k^3 -1 is a squarefree number with n prime divisors. a(n) = A088029(n)^(1/3).

2, 3, 15, 11, 87, 291, 1296, 3446, 7991, 91971, 106031, 1721591, 10625871, 53983491, 327917591, 1329773831

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