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 A197192 #11 Jul 11 2025 10:30:52
%S A197192 1,70,2695,75460,1716715,33647614,588833245,9421331920,140142312310,
%T A197192 1961992372340,26094498552122,332111799754280,4068369546989930,
%U A197192 48194531556649940,554237112901474310,6207455664496512272,67894046330430602975
%N A197192 a(n) = binomial(n+9, 9)*7^n.
%H A197192 Vincenzo Librandi, <a href="/A197192/b197192.txt">Table of n, a(n) for n = 0..400</a>
%F A197192 a(n) = C(n + 9, 9)*7^n.
%t A197192 Table[Binomial[n+9,9]7^n,{n,0,20}] (* _Harvey P. Dale_, Jul 10 2025 *)
%o A197192 (Magma) [Binomial(n+9, 9)*7^n: n in [0..20]];
%Y A197192 Cf. A139641, A140107, A140404, A170932
%K A197192 nonn,easy
%O A197192 0,2
%A A197192 _Vincenzo Librandi_, Oct 13 2011