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 A180355 #17 Feb 07 2023 08:50:49 %S A180355 0,6,42,258,1044,3150,7806,16842,32808,59094,100050,161106,248892, %T A180355 371358,537894,759450,1048656,1419942,1889658,2476194,3200100,4084206, %U A180355 5153742,6436458,7962744,9765750,11881506,14349042,17210508,20511294 %N A180355 a(n) = n^5 + 5n. %H A180355 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (6,-15,20,-15,6,-1). %F A180355 From _R. J. Mathar_, Sep 24 2010: (Start) %F A180355 G.f.: 6*x*(1+x+16*x^2+x^3+x^4)/(x-1)^6. %F A180355 a(n) = +6*a(n-1) -15*a(n-2) +20*a(n-3) -15*a(n-4) +6*a(n-5) -a(n-6). (End) %o A180355 (PARI) a(n)=n^5+5*n \\ _Charles R Greathouse IV_, Oct 16 2015 %Y A180355 Cf. A132411, A079908, A180354. %K A180355 nonn,easy %O A180355 0,2 %A A180355 _Odimar Fabeny_, Aug 30 2010 %E A180355 First term corrected by _Odimar Fabeny_, Sep 23 2010 %E A180355 a(0) corrected by _R. J. Mathar_, Sep 24 2010