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 A167734 #14 Sep 04 2025 20:32:13
%S A167734 521,10889,23201,27449,31769,36161,45161,54449,78929,99809,1148921,
%T A167734 1229201,1309769,1431161,2047841,2257001,2299049,2467961,2595401,
%U A167734 2680721,2766329,2809241,2895281,2938409,3024881,3329801,3417569,3461561
%N A167734 Primes that become squares when prefixed with a 1.
%H A167734 Alois P. Heinz, <a href="/A167734/b167734.txt">Table of n, a(n) for n = 1..20000</a> (first 59 terms from Vincenzo Librandi)
%t A167734 Select[Prime[Range[1000]], IntegerQ[Sqrt[FromDigits[Join[{1}, IntegerDigits[#]]]]]&] (* _G. C. Greubel_, Jun 23 2016 *)
%Y A167734 Cf. A167735, A167736, A167737, A167738, A167739, A167740, A167741.
%K A167734 base,nonn,changed
%O A167734 1,1
%A A167734 _Claudio Meller_, Nov 10 2009
%E A167734 More terms from _Michel Marcus_, Aug 05 2013