%I A041801
%S A041801 1,1,2,27,137,164,629,793,2215,3008,5223,8231,21685,203396,
%T A041801 225081,1778963,5561970,18464873,42491716,103448305,352836631,
%U A041801 1161958198,8486544017,9648502215,95323063952,200294630119
%N A041801 Denominators of continued fraction convergents to sqrt(421).
%Y A041801 Cf. A041800.
%Y A041801 Sequence in context: A061192 A041883 A038625 this_sequence A166942 A119351 
               A098627
%Y A041801 Adjacent sequences: A041798 A041799 A041800 this_sequence A041802 A041803 
               A041804
%K A041801 nonn,cofr,easy
%O A041801 0,3
%A A041801 N. J. A. Sloane (njas(AT)research.att.com).