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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A109394 A000934(A000934(n)). 0
 10, 12, 13, 13, 14, 15, 15, 15, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS FORMULA a(n) = floor( (7+sqrt(1+48*floor( (7+sqrt(1+48*n))/2 )))/2 ). EXAMPLE a(0) = 10 because A000934(0) = 4 and A000934(4) = 10. a(1) = 12 because A000934(1) = 7 and A000934(7) = 12. CROSSREFS Cf. A000934. Sequence in context: A187285 A098732 A301860 * A285687 A139704 A139819 Adjacent sequences: A109391 A109392 A109393 * A109395 A109396 A109397 KEYWORD easy,nonn AUTHOR Jonathan Vos Post, Aug 26 2005 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 March 28 23:19 EDT 2023. Contains 361596 sequences. (Running on oeis4.)