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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A236749 Positive integers n such that n^2 divided by the digital sum of n is a cube. 3
 1, 8, 81, 512, 1000, 2592, 6400, 8000, 10125, 19683, 20736, 34300, 35937, 36125, 46656, 59319, 74088, 81000, 123823, 125000, 157464, 185193, 268912, 279936, 328509, 373248, 421875, 431244, 469567, 474552, 481474, 512000, 592704, 658503, 795906, 804357 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE 2592 is in the sequence because the digital sum of 2592 is 18, and 2592^2/18 = 373248 = 72^3. PROG (PARI) s=[]; for(n=1, 100000, d=sumdigits(n); if(n^2%d==0 && ispower(n^2\d, 3), s=concat(s, n))); s CROSSREFS Cf. A007953, A236748, A236750, A236751. Sequence in context: A302822 A303515 A027768 * A343274 A240480 A274752 Adjacent sequences:  A236746 A236747 A236748 * A236750 A236751 A236752 KEYWORD nonn,base AUTHOR Colin Barker, Jan 30 2014 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 26 11:47 EST 2022. Contains 358359 sequences. (Running on oeis4.)