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 A146991 #4 Jun 02 2025 00:42:32 %S A146991 7,41,380,475,506,570,759,4901,36050,39845,48700,49964,50281,54075, %T A146991 55973,72100,74946,79690,90125,99928,499001,3200225,3247660,3497480, %U A146991 3747300,3905413,3997120,4246940,4623250,4803500,4999561,5002724 %N A146991 a(n)=sqrt(A145848(n)). %Y A146991 A145848 [From _Zak Seidov_, Nov 05 2008] %K A146991 nonn %O A146991 1,1 %A A146991 _Zak Seidov_, Nov 04 2008