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 A065939 #2 May 01 2014 02:49:32 %S A065939 1,25,223,3,3585,14847,30458,8053063679,7,128849018881,31588351, %T A065939 134140418588671,32178205,129990652, %U A065939 1318594171818636545920576603798101819391,15 %N A065939 Position of sqrt(n) in the mapping N2QuQR2 given in A065937. %p A065939 [seq(QuQR1toQuQR2(frac2position_in_0_1_SB_tree(sqrt_n_confrac2binfrac(n))), n=1..40)]; %Y A065939 a[n] = A065934[A065938[n]]. %K A065939 nonn %O A065939 1,2 %A A065939 _Antti Karttunen_, Dec 07 2001