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A087246 Square-free deficient numbers. +0
2
1, 2, 3, 5, 7, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 26, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 46, 47, 51, 53, 55, 57, 58, 59, 61, 62, 65, 67, 69, 71, 73, 74, 77, 79, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 101, 103, 105, 106, 107, 109, 110, 111, 113, 115, 118, 119 (list; graph; listen)
OFFSET

1,2

EXAMPLE

All primes are here.

Numerous composite solutions:See A087247.

n=21=3.7 and sigma[21]=1+3+7+21=32<2.21=42.

CROSSREFS

Cf. A087244-A087247, A008683, A000203, A013929, A005117.

Sequence in context: A046758 A121232 A122428 this_sequence A109608 A118241 A002269

Adjacent sequences: A087243 A087244 A087245 this_sequence A087247 A087248 A087249

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Sep 09 2003

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.


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