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 A017384 #22 Sep 08 2022 08:44:42 %S A017384 43046721,16983563041,500246412961,5352009260481,33232930569601, %T A017384 146830437604321,513798374428641,1517108809906561,3936588805702081, %U A017384 9227446944279201,19925626416901921,40213853471634241,76686282021340161 %N A017384 a(n) = (10*n + 9)^8. %H A017384 Vincenzo Librandi, <a href="/A017384/b017384.txt">Table of n, a(n) for n = 0..10000</a> %H A017384 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (9, -36, 84, -126, 126, -84, 36, -9, 1). %F A017384 From _Iain Fox_, Dec 02 2017: (Start) %F A017384 a(n) = 9*a(n-1) - 36*a(n-2) + 84*a(n-3) - 126*a(n-4) + 126*a(n-5) - 84*a(n-6) + 36*a(n-7) - 9*a(n-8) + a(n-9), n > 8. %F A017384 G.f.: (43046721 + 16596142552*x + 348944027548*x^2 + 1457583888744*x^3 + 1652522683270*x^4 + 520202222824*x^5 + 35893629468*x^6 + 214358872*x^7 + x^8)/(1-x)^9. %F A017384 E.g.f.: exp(x)*(43046721 + 16940516320*x + 233161166800*x^2 + 650362944000*x^3 + 614936700000*x^4 + 243902400000*x^5 + 43988000000*x^6 + 3520000000*x^7 + 100000000*x^8). (End) %F A017384 a(n) = A001016(A017377(n)). - _Felix Fröhlich_, Dec 03 2017 %t A017384 (10 Range[0, 19] + 9)^8 (* _Alonso del Arte_, Dec 02 2017 *) %o A017384 (Magma) [(10*n+9)^8: n in [0..20]]; // _Vincenzo Librandi_, Sep 01 2011 %o A017384 (PARI) a(n) = (10*n + 9)^8 \\ _Iain Fox_, Dec 02 2017 %Y A017384 Cf. A001016, A017377. %K A017384 nonn,easy %O A017384 0,1 %A A017384 _N. J. A. Sloane_