This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A196263 #12 Dec 26 2024 20:01:09 %S A196263 2,15,32,70,20,192,44,26,20,17,220,32,884,160,64,39,391,102,950,228, %T A196263 2080,32,348,186,253,1100,416,3780,55,77,247,608,754,1271,1792,310, %U A196263 2838,64,5984,96,940,340,265,629,190,960,8692,1634,115,287,2655,3680,5734,84,468,1316,11904,1820,90,938 %N A196263 Positive integers b in primitive (1/4)-Pythagorean triples (a,b,c) satisfying a<=b, in order of increasing a and then increasing b. %C A196263 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %H A196263 Robert Israel, <a href="/A196263/b196263.txt">Table of n, a(n) for n = 1..10000</a> %p A196263 F:= proc(a) %p A196263 sort(select(t -> subs(t, b) >= a and subs(t, c) > 0 and igcd(a, subs(t,b),subs(t,c)) = 1, [isolve](4*a^2 + 4*b^2 + a*b = 4*c^2)), (s, t) -> subs(s, b) <= subs(t, b)) %p A196263 end proc: %p A196263 seq(op(map(t -> subs(t, b), F(a))), a=1..100); # _Robert Israel_, Dec 20 2024 %t A196263 (See A196259.) %Y A196263 Cf. A195770, A196259, A196262, A196264, A196260. %K A196263 nonn %O A196263 1,1 %A A196263 _Clark Kimberling_, Sep 30 2011 %E A196263 Corrected by _Robert Israel_, Dec 25 2024