The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A339462 Numbers k such that (i*k)^(1/3) is an integer for some i in 1 <= i <= k. 1
 1, 4, 8, 9, 16, 18, 24, 25, 27, 32, 36, 40, 48, 49, 50, 54, 56, 64, 72, 75, 81, 96, 98, 100, 108, 121, 125, 128, 135, 144, 147, 160, 162, 169, 180, 189, 192, 196, 200, 216, 224, 225, 242, 243, 245, 250, 256, 270, 288, 289, 294, 297, 300, 320, 324, 338, 343, 351, 352, 360 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE 18 is in the sequence since (18*12)^(1/3) = 6 (an integer), with 1 <= 12 <= 18. MATHEMATICA Table[If[Sum[1 - Ceiling[(n*k)^(1/3)] + Floor[(n*k)^(1/3)], {k, n}] > 0, n, {}], {n, 400}] // Flatten CROSSREFS Cf. A339497. Sequence in context: A086368 A034024 A299117 * A140269 A339744 A226385 Adjacent sequences:  A339459 A339460 A339461 * A339463 A339464 A339465 KEYWORD nonn AUTHOR Wesley Ivan Hurt, Dec 27 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)