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Search: id:A068993
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| 6, 10, 14, 15, 16, 21, 22, 26, 33, 34, 35, 38, 39, 46, 51, 55, 57, 58, 62, 65, 69, 74, 77, 81, 82, 85, 86, 87, 91, 93, 94, 95, 106, 111, 115, 118, 119, 122, 123, 129, 133, 134, 141, 142, 143, 145, 146, 155, 158, 159, 161, 166, 177, 178, 183, 185, 187, 194, 201
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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4*a(n)^2 are the solutions to A048272(x)=sum(d/x,(-1)^d)=9 - Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 14 2002
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PROGRAM
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(PARI) for(n=1, 100, if(sumdiv(n, d, omega(d))==4, print1(n, ", ")))
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CROSSREFS
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Sequence in context: A163504 A129146 A063774 this_sequence A138592 A085232 A085234
Adjacent sequences: A068990 A068991 A068992 this_sequence A068994 A068995 A068996
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 06 2002
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