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A073417 Flawless numbers: numbers without a, f, l or w. 0

%I #6 Oct 13 2013 20:19:42

%S 1,3,6,7,8,9,10,13,16,17,18,19,30,31,33,36,37,38,39,61,63,66,67,68,69,

%T 70,71,73,76,77,78,79,80,81,83,86,87,88,89,90,91,93,96,97,98,99,100,

%U 101,103,106,107,108,109,110,113,116,117,118,119,130,131,133

%N Flawless numbers: numbers without a, f, l or w.

%C 1 and 6 seems to be the only numbers that are both flawless and perfect. 7 is the first odd number that is flawless but not perfect.

%D M. J. Halm, Sequences (Re)discovered, Mpossibilities 81 (Aug. 2002).

%e a(3) = 6 because 6 is the third integer without an a, f, l or w.

%K easy,nonn,word

%O 1,2

%A _Michael Joseph Halm_, Aug 23 2002

%E Corrected by _T. D. Noe_, Nov 01 2006

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)