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 A017385 #19 Jul 08 2025 06:04:25 %S A017385 387420489,322687697779,14507145975869,208728361158759, %T A017385 1628413597910449,8662995818654939,35452087835576229, %U A017385 119851595982618319,350356403707485209,913517247483640899,2171893279442309389 %N A017385 a(n) = (10*n + 9)^9. %H A017385 Vincenzo Librandi, <a href="/A017385/b017385.txt">Table of n, a(n) for n = 0..10000</a> %H A017385 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (10, -45, 120, -210, 252, -210, 120, -45, 10, -1). %t A017385 (10 Range[0, 20] + 9)^9 (* _Harvey P. Dale_, Sep 04 2011 *) %o A017385 (Magma) [(10*n+9)^9: n in [0..20]]; // _Vincenzo Librandi_, Sep 01 2011 %Y A017385 Cf. A272914, first comment. [From _Bruno Berselli_, May 26 2016] %K A017385 nonn,easy %O A017385 0,1 %A A017385 _N. J. A. Sloane_