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

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Last modified May 23 08:43 EDT 2017. Contains 286909 sequences.