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!)
A020691 Numbers of form 7 x^2 + 9 y^2. 1

%I #11 Aug 22 2014 14:13:08

%S 0,7,9,16,28,36,37,43,63,64,72,81,88,99,109,112,121,144,148,151,172,

%T 175,184,193,207,211,225,232,252,253,256,261,288,319,324,331,333,337,

%U 343,352,379,387,396,400,424,436,441,448,457,469,477,484,487,499,504,529,553,567

%N Numbers of form 7 x^2 + 9 y^2.

%H N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)

%t Take[Union[7#[[1]]+9#[[2]]&/@Tuples[Range[0,20]^2,2]],60] (* _Harvey P. Dale_, Aug 22 2014 *)

%K easy,nonn

%O 1,2

%A _David W. Wilson_

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 March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)