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A086263 Smaller of two consecutive square-free numbers having equal numbers of prime factors. +0
3
2, 14, 21, 33, 34, 38, 57, 85, 86, 93, 94, 118, 122, 133, 141, 142, 145, 158, 177, 201, 202, 205, 213, 214, 217, 218, 230, 253, 285, 298, 301, 302, 326, 334, 381, 393, 394, 429, 434, 445, 446, 453, 481, 501, 514, 526, 537, 542, 553, 565, 609, 622, 633, 634 (list; graph; listen)
OFFSET

1,1

COMMENT

A001221(a(n))=A001222(a(n))=A001221(a(n)+1)=A001222(a(n)+1);

a(k) is a term of A075039 iff a(k)+1 = a(k+1).

EXAMPLE

230 = 2*5*23 and 230+1 = 3*7*11, therefore 230 is a term.

CROSSREFS

Cf. A005117.

Sequence in context: A005237 A140578 A052213 this_sequence A073143 A066613 A074312

Adjacent sequences: A086260 A086261 A086262 this_sequence A086264 A086265 A086266

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 14 2003

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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