login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046087 Middle member 'b' of the primitive Pythagorean triples (a,b,c) ordered by increasing c, then b. 22

%I

%S 4,12,15,24,21,35,40,45,60,56,63,55,77,84,80,72,99,91,112,117,105,143,

%T 144,140,132,120,165,180,153,176,168,195,156,187,171,220,221,208,209,

%U 255,247,264,260,252,231,240,285,224,273,312,308,253,323,288,299,272

%N Middle member 'b' of the primitive Pythagorean triples (a,b,c) ordered by increasing c, then b.

%H Ivan Neretin, <a href="/A046087/b046087.txt">Table of n, a(n) for n = 1..10000</a>

%H F. Richman, <a href="http://math.fau.edu/Richman/mla/pythag3s.htm">Pythagorean Triples</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PythagoreanTriple.html">Pythagorean Triple</a>

%t maxHypo = 389; r[b_, c_] := Reduce[0 < a <= b < c && a^2 + b^2 == c^2, a, Integers]; Reap[Do[r0 = r[b, c]; If[r0 =!= False, {a0, b0, c0} = {a, b, c} /. ToRules[r0]; If[GCD[a0, b0, c0] == 1, Print[b0]; Sow[b0]]], {c, 1, maxHypo}, {b, 1, maxHypo}]][[2, 1]] (* _Jean-Fran├žois Alcover_, Oct 22 2012 *)

%Y Cf. A046086, A020882.

%K nonn,look

%O 1,1

%A _Eric W. Weisstein_

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 June 5 16:18 EDT 2020. Contains 334852 sequences. (Running on oeis4.)