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 A091947 #8 Feb 16 2025 08:32:52
%S A091947 0,1,21,331,4641,61051,771561,9487171,14358881,357947691,5937424601,
%T A091947 85311670611,138428376721,4522712143931,79749833583241,
%U A091947 177248169415651,5949729863572161,5447028499293771,559917313492231481
%N A091947 (Fractional part of 1.1^n) * 10^n.
%C A091947 a(n) = A001020(n) mod A011557(n).
%H A091947 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FractionalPart.html">Fractional Part</a>
%e A091947 a(2) = (1.1^2 - floor(1.1^2))*10^2 = (1.21 - 1)*100 = 21.
%t A091947 Table[ FractionalPart[(11/10)^n] 10^n, {n, 0, 19}] (* _Robert G. Wilson v_, Feb 18 2004 *)
%Y A091947 Cf. A091946.
%K A091947 nonn
%O A091947 0,3
%A A091947 _Reinhard Zumkeller_, Feb 16 2004