This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A123314 Number of times the n-th squarefree number occurs as maximal greatest common divisor of pairs of distinct squarefree numbers. 3
 4, 0, 2, 3, 0, 5, 0, 2, 2, 0, 3, 3, 3, 2, 0, 6, 0, 3, 0, 2, 3, 0, 3, 2, 0, 2, 3, 0, 5, 0, 4, 3, 3, 3, 2, 0, 2, 4, 0, 3, 0, 2, 3, 0, 3, 3, 0, 3, 0, 5, 0, 2, 2, 0, 2, 3, 3, 2, 0, 3, 5, 3, 0, 2, 3, 0, 3, 3, 0, 2, 3, 0, 5, 0, 3, 0, 5, 3, 2, 0, 3, 5, 0, 2, 0, 2, 3, 0, 2, 4, 0, 3, 5, 0, 3, 2, 0, 3, 2, 3, 2, 0, 6, 0, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) > 0 iff A005117(n) is an odd squarefree number: a(A100112(A056911(n)))>0; a(n) = 0 iff A005117(n) is an even squarefree number: a(A100112(A039956(n)))=0. LINKS FORMULA a(n) = #{k: A123313(k) = A005117(n)}. CROSSREFS Sequence in context: A180850 A109157 A226955 * A058997 A261164 A323982 Adjacent sequences:  A123311 A123312 A123313 * A123315 A123316 A123317 KEYWORD nonn AUTHOR Reinhard Zumkeller, Sep 25 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 24 18:34 EDT 2019. Contains 323534 sequences. (Running on oeis4.)