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 A070108 #6 Mar 30 2012 18:50:20 %S A070108 0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0, %T A070108 0,0,0,0,1,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0, %U A070108 1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0 %N A070108 Number of integer triangles with perimeter n and prime side lengths which are obtuse and isosceles. %H A070108 R. Zumkeller, <a href="/A070080/a070080.txt">Integer-sided triangles</a> %e A070108 a(k)<=1 until k = 140, for k = 141 there are A005044(141)=432 integer triangles, a(141)=2 as %e A070108 [37=37<67]: 37+37+67 = 141 and 2*(37^2)<67^2 and 37, 67 are primes, %e A070108 [41=41<59]: 41+41+59 = 141 and 2*(41^2)<59^2 and 41, 59 are primes. %Y A070108 Cf. A070080, A070081, A070082, A070101, A059169, A070088, A070092, A070103, A070106, A070135. %K A070108 nonn %O A070108 1,1 %A A070108 _Reinhard Zumkeller_, May 05 2002