This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A075424 A075423(A075423(n)). 2
 0, 1, 0, 1, 4, 5, 0, 1, 2, 9, 4, 5, 12, 13, 0, 1, 4, 5, 2, 9, 20, 21, 4, 1, 4, 1, 12, 13, 28, 29, 0, 1, 32, 33, 4, 5, 36, 37, 2, 9, 40, 41, 20, 13, 14, 45, 4, 5, 2, 9, 4, 25, 4, 5, 12, 13, 56, 57, 28, 29, 60, 9, 0, 1, 64, 65, 32, 33, 68, 69, 4, 5, 72, 13, 36, 37, 76, 77, 2, 1, 2, 81, 40, 41 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,5 COMMENTS From Robert Israel, Apr 11 2019: (Start) a(n) == n (mod 2). a(n) = 0 iff n is in A000079. a(n) = n-2 iff n-1 is in A007674. (End) LINKS Robert Israel, Table of n, a(n) for n = 2..10000 MAPLE A075423:= n -> convert(numtheory:-factorset(n), `*`)-1: map(A075423@@2, [\$2..100]); # Robert Israel, Apr 11 2019 CROSSREFS Cf. A000079, A007674, A075423, A075425. Sequence in context: A254294 A143574 A262400 * A200619 A199621 A199390 Adjacent sequences:  A075421 A075422 A075423 * A075425 A075426 A075427 KEYWORD nonn,look,changed AUTHOR Reinhard Zumkeller, Sep 15 2002 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 April 21 20:03 EDT 2019. Contains 322328 sequences. (Running on oeis4.)