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 A197193 #23 Jul 12 2025 16:12:02
%S A197193 1,77,3234,98098,2403401,50471421,942133192,16016264264,252256162158,
%T A197193 3727785507446,52188997104244,697434779483988,8950413003377846,
%U A197193 110847422580294862,1330169070963538344,15518639161241280680,176524520459119567735,1962537315692564605995,21369850770874592376390,228319984551975908021430
%N A197193 a(n) = binomial(n+10, 10)*7^n.
%H A197193 Vincenzo Librandi, <a href="/A197193/b197193.txt">Table of n, a(n) for n = 0..400</a>
%H A197193 <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (77,-2695,56595,-792330,7764834,-54353838,271769190,-951192165,2219448385,-3107227739,1977326743).
%F A197193 a(n) = C(n + 10, 10)*7^n.
%F A197193 G.f.: -1 / (7*x-1)^11 . - _R. J. Mathar_, Oct 13 2011
%t A197193 Table[Binomial[n+10,10]7^n,{n,0,30}] (* or *) LinearRecurrence[{77,-2695,56595,-792330,7764834,-54353838,271769190,-951192165,2219448385,-3107227739,1977326743},{1,77,3234,98098,2403401,50471421,942133192,16016264264,252256162158,3727785507446,52188997104244},30] (* _Harvey P. Dale_, Jul 11 2025 *)
%o A197193 (Magma) [Binomial(n+10, 10)*7^n: n in [0..20]];
%Y A197193 Cf. A139641, A140107, A140404, A170932
%K A197193 nonn,easy
%O A197193 0,2
%A A197193 _Vincenzo Librandi_, Oct 13 2011