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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A084863 Number of solutions to n = 2*u^2 + 3*v^2, u*v>0. 3
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,35

COMMENTS

a(A084864(n)) > 0.

LINKS

Table of n, a(n) for n=1..102.

Eric Weisstein's World of Mathematics, Diophantine Equation: 2nd Powers.

EXAMPLE

n=770 = 2*19^2 + 3*4^2 = 2*17^2 + 3*8^2 = 2*13^2 + 3*12^2 = 2*1 +

3*16^2, therefore a(770)=4.

CROSSREFS

Cf. A084865, A084866.

Sequence in context: A188585 A294068 A181011 * A233441 A255365 A256505

Adjacent sequences:  A084860 A084861 A084862 * A084864 A084865 A084866

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 10 2003

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 October 18 14:52 EDT 2019. Contains 328161 sequences. (Running on oeis4.)