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 A272683 #15 May 23 2016 19:26:38 %S A272683 35,4,105,4,35,4465115625,425,35,345,10714375,125,435259453125,14,13, %T A272683 12,11,109515625,109556109375,35,4,136875,14133578125,125,1365,425,4, %U A272683 375,35,1375,34040625,10642755859375,3333202626953125,351966828673004150390625,11076674002613037109375,35,351172546875,33875,11,12,13 %N A272683 Square root of concatenation of 1 and A265432(n). %C A272683 The square of a(n) is one of the two squares that are required by the definition of A265432(n). The other is in A272682. %C A272683 Of course if it ever happens that A265432(n) = -1, the definition will need to be changed. %H A272683 N. J. A. Sloane, <a href="/A272683/b272683.txt">Table of n, a(n) for n = 0..10000</a> %H A272683 N. J. A. Sloane, <a href="/A265432/a265432.txt">Table of n, A265432(n), sqrt(concat(n,A265432(n))), sqrt(concat(1,A265432(n)))</a> (based on _David W. Wilson_ 10000-term b-file for A265432) %Y A272683 Cf. A265432, A272682. %K A272683 nonn,base %O A272683 0,1 %A A272683 _Nathan Fox_, _Brooke Logan_, and _N. J. A. Sloane_, May 23 2016