The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A029913 Start with n; if prime, stop; repeatedly sum squares of prime factors (counted with multiplicity), until reach 16 or a prime; set a(n) = 0 if no limit exists. 1
 2, 3, 17, 5, 13, 7, 17, 59, 29, 11, 17, 13, 53, 293, 16, 17, 59, 19 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS Table of n, a(n) for n=2..19. EXAMPLE 9 -> 3^2 + 3^2 = 18 -> 4 + 9 + 9 = 22 -> 4 + 121 = 125 -> 25 + 25 + 25 = 75 -> 9 + 25 + 25 = 59, so a(9) = 59. CROSSREFS Cf. A029914. Sequence in context: A171990 A103898 A140383 * A073125 A171240 A078201 Adjacent sequences: A029910 A029911 A029912 * A029914 A029915 A029916 KEYWORD nonn,more AUTHOR Dann Toliver EXTENSIONS More terms from Michel ten Voorde, Apr 12 2001 Incorrect extension reverted by Sean A. Irvine, Mar 08 2020 STATUS approved

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

Last modified November 29 17:03 EST 2023. Contains 367445 sequences. (Running on oeis4.)