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 A201122 #10 Jul 22 2025 16:06:23 %S A201122 2,20,32,95,3420,8847,89927,494576,1347932,48525552,265807127, %T A201122 682379927,3237653360,52571448911,356954431580,1333226567615, %U A201122 6534477744687,69394484050880,10500704463815,378025360697340,13608912985104240,60046182811381232,227226500274052935,442409686123219952,15926748700435918272 %N A201122 Differences between odd powers of 6 and the next smaller square. %H A201122 Hugo Pfoertner, <a href="/A201122/b201122.txt">Table of n, a(n) for n = 1..500</a> %F A201122 a(n)=6^(2*n-1) - floor(sqrt(6^(2*n-1)))^2 %e A201122 a(1)=6^1-2^2=2, a(2)=6^3-14^2=216-196=20, a(3)=6^5-88^2=7776-7744=32 %t A201122 #-Floor[Sqrt[#]]^2&/@(6^Range[1,51,2]) (* _Harvey P. Dale_, Aug 12 2012 *) %Y A201122 Cf. A051217, A200440, A200506 %K A201122 nonn %O A201122 1,1 %A A201122 _Hugo Pfoertner_, Nov 27 2011