This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A020685 Numbers of form 5 x^2 + 6 y^2. 1
 0, 5, 6, 11, 20, 24, 26, 29, 44, 45, 51, 54, 59, 69, 74, 80, 86, 96, 99, 101, 104, 116, 125, 131, 134, 141, 149, 150, 155, 170, 176, 179, 180, 186, 195, 204, 216, 221, 230, 234, 236, 245, 251, 261, 269, 275, 276, 294, 296, 299, 314, 320, 326, 330, 339, 341, 344, 374, 384 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references) MATHEMATICA Module[{upto=400}, Select[Union[Flatten[{5*First[#]^2+6*Last[#]^2, 6*First[#]^2+ 5*Last[#]^2}&/@Tuples[Range[0, Ceiling[Sqrt[ upto/5]]], 2]]], #<=upto&]] (* Harvey P. Dale, Sep 04 2013 *) CROSSREFS Sequence in context: A041052 A236387 A039918 * A275492 A046828 A328095 Adjacent sequences:  A020682 A020683 A020684 * A020686 A020687 A020688 KEYWORD easy,nonn AUTHOR 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 December 15 04:23 EST 2019. Contains 329991 sequences. (Running on oeis4.)