login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020688 Numbers of form 5 x^2 + 9 y^2. 0
0, 5, 9, 14, 20, 29, 36, 41, 45, 54, 56, 80, 81, 86, 89, 101, 116, 125, 126, 134, 144, 149, 161, 164, 180, 189, 206, 216, 224, 225, 230, 245, 254, 261, 269, 270, 281, 305, 320, 324, 326, 329, 344, 350, 356, 369, 389, 401, 404, 405, 414, 441, 446, 449, 461, 464, 470, 486 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..58.

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

CROSSREFS

Sequence in context: A314973 A314974 A314975 * A314976 A314977 A314978

Adjacent sequences:  A020685 A020686 A020687 * A020689 A020690 A020691

KEYWORD

easy,nonn

AUTHOR

David W. Wilson

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 07:51 EDT 2019. Contains 322381 sequences. (Running on oeis4.)