The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A055393 Sum of a square and a nonnegative cube in more than one way. 4

%I #9 May 24 2016 04:13:49

%S 1,9,17,36,64,65,89,100,108,129,145,196,225,233,252,289,297,316,388,

%T 441,449,464,505,512,537,548,576,577,593,633,729,730,737,745,784,792,

%U 793,801,841,873,1000,1025,1088,1090,1116,1225,1289,1296,1304,1305,1367

%N Sum of a square and a nonnegative cube in more than one way.

%H T. D. Noe, <a href="/A055393/b055393.txt">Table of n, a(n) for n = 1..10000</a>

%e a(12) = 225 since 225 = 6^3 + 3^2 = 5^3 + 10^2 = 0^3 + 15^2.

%t nn = 2000; t = Table[0, {nn}]; Do[n = i^2 + j^3; If[0 < n <= nn, t[[n]]++], {i, 0, Sqrt[nn]}, {j, 0, nn^(1/3)}]; Flatten[Position[t, _?(# > 1 &)]] (* _T. D. Noe_, Dec 08 2012 *)

%Y Cf. A022549, A055394.

%K nice,nonn

%O 1,2

%A _Henry Bottomley_, May 12 2000

%E Extended by _T. D. Noe_, Dec 08 2012

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 3 07:50 EDT 2024. Contains 373054 sequences. (Running on oeis4.)