%I A017020
%S A017020 81,10000,83521,331776,923521,2085136,4100625,7311616,12117361,
%T A017020 18974736,28398241,40960000,57289761,78074896,104060401,
%U A017020 136048896,174900625,221533456,276922881,342102016,418161601
%N A017020 (7n+3)^4.
%Y A017020 Sequence in context: A034993 A093281 A059988 this_sequence A058422 A053913 
               A053895
%Y A017020 Adjacent sequences: A017017 A017018 A017019 this_sequence A017021 A017022 
               A017023
%K A017020 nonn,easy
%O A017020 0,1
%A A017020 N. J. A. Sloane (njas(AT)research.att.com).