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 A017405 #20 Aug 26 2025 08:34:26
%S A017405 1,248832,6436343,45435424,184528125,550731776,1350125107,2887174368,
%T A017405 5584059449,10000000000,16850581551,27027081632,41615795893,
%U A017405 61917364224,89466096875,126049300576,173726604657
%N A017405 a(n) = (11*n+1)^5.
%H A017405 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (6,-15,20,-15,6,-1).
%F A017405 a(0)=1, a(1)=248832, a(2)=6436343, a(3)=45435424, a(4)=184528125, a(5)=550731776, 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). - _Harvey P. Dale_, Apr 04 2012
%F A017405 a(n) = A000584(A017401(n)). - _Jason Yuen_, Aug 26 2025
%t A017405 (11Range[0,20]+1)^5 (* or *) LinearRecurrence[{6,-15,20,-15,6,-1},{1,248832,6436343,45435424,184528125,550731776},20] (* _Harvey P. Dale_, Apr 04 2012 *)
%Y A017405 Cf. A000584, A017401.
%K A017405 nonn,easy,changed
%O A017405 0,2
%A A017405 _N. J. A. Sloane_