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 A262786 #15 Sep 08 2022 08:46:14 %S A262786 37,50653,69343957,94931877133,129961739795077,177917621779460413, %T A262786 243569224216081305397,333446267951815307088493, %U A262786 456487940826035155404146917,624931990990842127748277129373,855531895666462872887391390111637,1171223165167387672982838813062831053 %N A262786 a(n) = 37^(2*n+1). %C A262786 37*a(n) is a square. %H A262786 G. C. Greubel, <a href="/A262786/b262786.txt">Table of n, a(n) for n = 0..250</a> %H A262786 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1369). %F A262786 G.f.: 37/(1 - 1369*x). %F A262786 a(n) = 1369*a(n-1). %F A262786 a(n) = A009981(A005408(n)). - _Wesley Ivan Hurt_, Sep 04 2022 %t A262786 37^Range[1, 30, 2] %o A262786 (Magma) [37^(2*n+1): n in [0..15]]; %o A262786 (PARI) vector(20, n, n--; 37^(2*n+1)) \\ _Altug Alkan_, Oct 08 2015 %Y A262786 Second bisection of A009981 (powers of 37). %Y A262786 Cf. similar sequences listed in A262715. %Y A262786 Cf. A005408, A009981. %K A262786 nonn,easy %O A262786 0,1 %A A262786 _Vincenzo Librandi_, Oct 08 2015