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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A097265 Primitive Pythagorean Quadruples a^2+b^2+c^2=d^2, 0<a<=b<=c<=d, gcd(a,b,c,d)=1, sorted by d, then c, then b; sequence gives long even leg values. 1
2, 6, 4, 8, 6, 6, 12, 10, 14, 12, 12, 10, 6, 18, 16, 16, 8, 20, 18, 18, 22, 16, 20, 22, 10, 14, 10, 26, 16, 24, 24, 18, 22, 14, 30, 20, 20, 28, 28, 8, 32, 32, 26, 30, 30, 10, 24, 28, 28, 36, 26, 22, 26, 34, 34, 14, 24, 24, 32, 24, 12, 30, 30, 38, 18, 42, 42, 28, 28, 20, 40, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

One of a,b,c is odd, other two are even for primitive Pythagorean quadruples.

LINKS

Table of n, a(n) for n=1..72.

Eric Weisstein's World of Mathematics, Pythagorean Quadruple.

CROSSREFS

Cf. A096907, A096908, A096909.

Sequence in context: A088438 A259284 A204906 * A201895 A192408 A074208

Adjacent sequences:  A097262 A097263 A097264 * A097266 A097267 A097268

KEYWORD

nonn

AUTHOR

Ray Chandler, Aug 15 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 | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 22 22:58 EDT 2018. Contains 316518 sequences. (Running on oeis4.)