A063764 Nonprimes k such that largest prime factor of k > k^(2/3).

10, 14, 22, 26, 33, 34, 38, 39, 46, 51, 57, 58, 62, 68, 69, 74, 76, 82, 86, 87, 92, 93, 94, 106, 111, 116, 118, 122, 123, 124, 129, 134, 141, 142, 145, 146, 148, 155, 158, 159, 164, 166, 172, 177, 178, 183, 185, 188, 194, 201, 202, 205, 206, 212, 213, 214, 215

Offset

1,1

Links

Harry J. Smith, Table of n, a(n) for n = 1..1000

Mathematica

Select[ Range[ 2, 250 ], !PrimeQ[ # ] && FactorInteger[ # ] [ [ -1, 1 ] ] > #^(2/3) & ]

Prog

(PARI) { n=0; for (m=2, 10^9, f=vecmax(component(factor(m), 1)); if(!isprime(m) && f^3 > m^2, write("b063764.txt", n++, " ", m); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 30 2009

Crossrefs

Cf. A006530 (largest prime factor).

Sequence in context: A231170 A348306 A337709 * A253569 A138511 A319802

Adjacent sequences: A063761 A063762 A063763 * A063765 A063766 A063767

Keyword

nonn

Author

Robert G. Wilson v, Aug 14 2001

Status

approved