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 A077634 #4 Oct 15 2013 22:31:40
%S A077634 2,6,30,18,90,54,106260,162,26040,486,341725784400,1458,
%T A077634 6564164506066423389173040,4374,177815552218920,13122,
%U A077634 2998833665484118393000638135815684490471025925316000,39366
%N A077634 LCM of terms in periodic part of continued fraction expansion of square root of 1+3^n.
%t A077634 Table[Apply[LCM, Last[ContinuedFraction[Sqrt[1+3^u]]]], {u, 1, 25}]
%Y A077634 Cf. A077624-A077635.
%K A077634 nonn
%O A077634 1,1
%A A077634 _Labos Elemer_, Nov 13 2002