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A086975 Numbers of the form p^2 * q * r with primes p < q < r. +0
2
60, 84, 132, 140, 156, 204, 220, 228, 260, 276, 308, 315, 340, 348, 364, 372, 380, 444, 460, 476, 492, 495, 516, 532, 564, 572, 580, 585, 620, 636, 644, 693, 708, 732, 740, 748, 765, 804, 812, 819, 820, 836, 852, 855, 860, 868, 876, 884, 940, 948, 988 (list; graph; listen)
OFFSET

1,1

COMMENT

A001221(a(n))=3, A001222(a(n))=4;

A020639(a(n))^2 divides a(n);

subsequence of A086974 and of A085987.

CROSSREFS

Sequence in context: A086974 A099831 A138604 this_sequence A073461 A100659 A069976

Adjacent sequences: A086972 A086973 A086974 this_sequence A086976 A086977 A086978

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 25 2003

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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