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 A067424 #17 Sep 30 2022 02:05:27
%S A067424 1,11,297,8019,216513,5845851,157837977,4261625379,115063885233,
%T A067424 3106724901291,83881572334857,2264802453041139,61149666232110753,
%U A067424 1651040988266990331,44578106683208738937,1203608880446635951299
%N A067424 Ninth column of triangle A067417.
%H A067424 Vincenzo Librandi, <a href="/A067424/b067424.txt">Table of n, a(n) for n = 0..700</a>
%H A067424 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (27).
%F A067424 a(n) = A067417(n+8, 8).
%F A067424 a(n) = 11*(3*9)^(n-1), n >= 1, a(0)=1.
%F A067424 G.f.: (1-16*x)/(1-27*x).
%F A067424 E.g.f.: (16 + 11*exp(27*x))/27. - _Stefano Spezia_, Sep 30 2022
%t A067424 CoefficientList[Series[(1-16x)/(1-27x),{x,0,30}],x] (* or *) LinearRecurrence[{27},{1,11},20] (* _Harvey P. Dale_, Apr 20 2022 *)
%o A067424 (Magma) [Ceiling(11*(3*9)^(n-1)): n in [0..20]]; // _Vincenzo Librandi_, Oct 02 2011
%Y A067424 Cf. A067417, A067423 (eighth column), A009971 (powers of 27).
%K A067424 nonn,easy
%O A067424 0,2
%A A067424 _Wolfdieter Lang_, Jan 25 2002