A165290 Numbers which cannot be represented as a cube - nearest square (cube >= square).

1, 3, 5, 6, 8, 9, 10, 12, 14, 15, 16, 17, 18, 21, 22, 23, 24, 25, 27, 29, 30, 31, 32, 33, 34, 36, 37, 38, 41, 42, 43, 44, 46, 50, 51, 52, 54, 57, 58, 59, 61, 62, 64, 65, 66, 68, 69, 70, 71, 72, 73, 75, 77, 78, 80, 82, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98

Offset

1,2

Comments

Complement of A165288.

Links

Table of n, a(n) for n=1..71.

Mathematica

lst={}; Do[a=n^3-Floor[Sqrt[n^3]]^2; If[a<=508, AppendTo[lst, a]], {n, 2*8!}]; lst=Take[Union@lst, 90]; lst1={}; Do[AppendTo[lst1, n], {n, 508}]; lst1; Complement[lst1, lst]

Crossrefs

Cf. A165288, A165289

Sequence in context: A105206 A080036 A242535 * A307206 A026430 A002150

Adjacent sequences: A165287 A165288 A165289 * A165291 A165292 A165293

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Sep 13 2009

Status

approved