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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. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 23 22:17 EDT 2019. Contains 322388 sequences. (Running on oeis4.)