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 A224790 #21 Sep 08 2022 08:46:04 %S A224790 11,35,251,2195,19691,177155,1594331,14348915,129140171,1162261475, %T A224790 10460353211,94143178835,847288609451,7625597484995,68630377364891, %U A224790 617673396283955,5559060566555531,50031545098999715,450283905890997371,4052555153018976275 %N A224790 a(n) = 3*9^n + 8. %C A224790 Number of conjugacy classes in Ree group 2G2(3*9^n). %H A224790 Eric M. Schmidt, <a href="/A224790/b224790.txt">Table of n, a(n) for n = 0..1000</a> %H A224790 Frank Luebeck, <a href="http://www.math.rwth-aachen.de/~Frank.Luebeck/chev/nrclasses/nrclasses.html">Numbers of Conjugacy Classes in Finite Groups of Lie Type</a>. %H A224790 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (10,-9). %F A224790 G.f.: 8/(1-x) + 3/(1-9*x). %F A224790 a(n) = 10*a(n-1) - 9*a(n-2). %F A224790 E.g.f.: 8*exp(x) + 3*exp(9*x). - _G. C. Greubel_, Nov 12 2019 %p A224790 seq(8+3^(2*n+1), n=0..20); # _G. C. Greubel_, Nov 12 2019 %t A224790 8 + 3^(2*Range[21]-1) (* _G. C. Greubel_, Nov 12 2019 *) %o A224790 (Sage) [3*9^n+8 for n in [0..20]] %o A224790 (PARI) a(n)=3*9^n+8 \\ _Charles R Greathouse IV_, Sep 24 2015 %o A224790 (Magma) [8 + 3^(2*n+1): n in [0..20]]; // _G. C. Greubel_, Nov 12 2019 %o A224790 (GAP) List([0..20], n-> 8 + 3^(2*n+1)); # _G. C. Greubel_, Nov 12 2019 %Y A224790 Cf. A188161. %K A224790 nonn,easy %O A224790 0,1 %A A224790 _Eric M. Schmidt_, Apr 18 2013