

A073417


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


0



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, 70, 71, 73, 76, 77, 78, 79, 80, 81, 83, 86, 87, 88, 89, 90, 91, 93, 96, 97, 98, 99, 100, 101, 103, 106, 107, 108, 109, 110, 113, 116, 117, 118, 119, 130, 131, 133
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OFFSET

1,2


COMMENTS

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.


REFERENCES

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


LINKS

Table of n, a(n) for n=1..62.


EXAMPLE

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


CROSSREFS

Sequence in context: A073850 A048748 A030781 * A047559 A113826 A053030
Adjacent sequences: A073414 A073415 A073416 * A073418 A073419 A073420


KEYWORD

easy,nonn,word


AUTHOR

Michael Joseph Halm, Aug 23 2002


EXTENSIONS

Corrected by T. D. Noe, Nov 01 2006


STATUS

approved



