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!)
A096783 Numbers n such that n, n+1, n+2, n+3, n+4 are all of the form x^2+2*y^2 for nonnegative x, y. 1
0, 96, 800, 2400, 3200, 3648, 4096, 4800, 6272, 7296, 9600, 18272, 19648, 20000, 20672, 23648, 28224, 28800, 29472, 31424, 34848, 36896, 37472, 43072, 48672, 50272, 51200, 53600, 53824, 55072, 57696, 59648, 62848, 64800, 66048, 69824 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
96=8^2+2*4^2, 97=5^2+2*6^2, 98 = 0^2+2*7^2,99=9^2+2*3^2=7^2+2*5^2,100=10^2+2*0^2
MATHEMATICA
f[n_] := f[n_] = Block[{y = 0}, While[x = Sqrt[n - 2y^2]; !IntegerQ[x] && x >= 0, y++ ]; If[x \[Element] Reals, 1, 0]]; Select[ Range[0, 76895], f[ # ] == f[ # + 1] == f[ # + 2] == f[ # + 3] == f[ # + 4] == 1 &] (* Robert G. Wilson v, Aug 20 2004 *)
CROSSREFS
Sequence in context: A269032 A187610 A269215 * A253410 A326576 A202890
KEYWORD
nonn
AUTHOR
John L. Drost, Aug 16 2004
EXTENSIONS
More terms from Robert G. Wilson v, Aug 20 2004
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 22 13:22 EDT 2024. Contains 372755 sequences. (Running on oeis4.)