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A069081 Numbers n such that sigma(n)/tau(n) has denominator 2. 0
2, 10, 18, 24, 26, 32, 34, 50, 58, 74, 82, 88, 90, 98, 106, 120, 122, 130, 146, 152, 160, 170, 178, 194, 202, 216, 218, 226, 234, 242, 250, 274, 288, 290, 298, 306, 312, 314, 338, 344, 346, 362, 370, 386, 394, 408, 410, 416, 440, 442, 458, 466, 472, 482, 490 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

FORMULA

n such that A057021(n)=2

CROSSREFS

Sequence in context: A077247 A082939 A074069 * A126005 A017089 A097269

Adjacent sequences:  A069078 A069079 A069080 * A069082 A069083 A069084

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Apr 05 2002

STATUS

approved

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Last modified April 22 06:14 EDT 2019. Contains 322329 sequences. (Running on oeis4.)