A074255 Numbers n such that the sum of composites from the smallest prime factor of n to the largest prime factor of n is equal to the sum of squarefree numbers from the smallest prime factor of n to the largest prime factor of n.

1, 1147, 3953, 5609, 7387, 35557, 42439, 55189, 64507, 70747, 198907, 233227, 239117, 241133, 264851, 348091, 372091, 398239, 409457, 431633, 443111, 568507, 613121, 657443, 988027, 1071209, 1102267, 1136347, 1315609, 1416091, 1570243

Offset

1,2

Links

Table of n, a(n) for n=1..31.

Example

1147 = 31*37; sum of composites between 31 and 37 is: 32+33+34+35+36 = 170 and sum of squarefree numbers between 31 and 37 is: 31+33+34+35+37 = 170.

Crossrefs

Sequence in context: A180344 A031785 A274297 * A234684 A270513 A233944

Adjacent sequences: A074252 A074253 A074254 * A074256 A074257 A074258

Keyword

nonn

Author

Jason Earls, Sep 20 2002

Extensions

a(7)-a(31) from Donovan Johnson, Oct 12 2008

Status

approved