This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A131801 Increment each prime factor for each term of the least prime sequence A087443. 2
 1, 3, 9, 15, 27, 45, 105, 81, 135, 225, 315, 1155, 243, 405, 675, 945, 1575, 3465, 15015, 729, 1215, 2025, 3375, 2835, 4725, 10395, 11025, 17325, 45045, 255255, 2187, 3645, 6075, 10125, 8505, 14175, 23625, 31185, 33075, 51975, 121275, 135135, 225225 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA T(n,k) = A003961[A087443(n,k)]. - R. J. Mathar, Aug 01 2007 EXAMPLE The term 30 = 2*3*5 becomes 105 = 3*5*7 A087443 begins 1 2 4...6 8...12...30 16 etc so a(n) begins 1 3 9...15 27..45..105 81 etc CROSSREFS Cf. A025487. Cf. A131822. Sequence in context: A147516 A233819 A131822 * A280963 A122819 A056287 Adjacent sequences:  A131798 A131799 A131800 * A131802 A131803 A131804 KEYWORD easy,tabf,nonn AUTHOR Alford Arnold, Jul 16 2007 EXTENSIONS More terms from R. J. Mathar, Aug 01 2007 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 15 18:27 EDT 2018. Contains 313779 sequences. (Running on oeis4.)