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A072901
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Composite numbers n such that the discriminant of the quadratic field Q(sqrt(n) equals 4n.
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0
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6, 10, 14, 15, 22, 26, 30, 34, 35, 38, 39, 42, 46, 51, 55, 58, 62, 66, 70, 74, 78, 82, 86, 87, 91, 94, 95, 102, 106, 110, 111, 114, 115, 118, 119, 122, 123, 130, 134, 138, 142, 143, 146, 154, 155, 158, 159, 166, 170, 174, 178, 182, 183, 186, 187, 190, 194, 195
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Conjecture: Numbers n such that n=p*p_1*p_2*,.,* p_n and p is not repeat. Example: 6=2*3; 15=3*5; 30=2*3*5; 154=2*7*11; 195=3*5*13 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 08 2010]
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CROSSREFS
| Cf. A037449.
Sequence in context: A063078 A064452 A085647 * A162409 A183072 A193416
Adjacent sequences: A072898 A072899 A072900 * A072902 A072903 A072904
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KEYWORD
| easy,nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 10 2002
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