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 A170765 #30 Sep 08 2022 08:45:49
%S A170765 1,46,2070,93150,4191750,188628750,8488293750,381973218750,
%T A170765 17188794843750,773495767968750,34807309558593750,1566328930136718750,
%U A170765 70484801856152343750,3171816083526855468750,142731723758708496093750,6422927569141882324218750
%N A170765 Expansion of g.f.: (1+x)/(1-45*x).
%H A170765 Vincenzo Librandi, <a href="/A170765/b170765.txt">Table of n, a(n) for n = 0..600</a>
%H A170765 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (45).
%F A170765 a(n) = Sum_{k=0..n} A097805(n,k)*(-1)^(n-k)*46^k. - _Philippe Deléham_, Dec 04 2009
%F A170765 a(0) = 1; for n>0, a(n) = 46*45^(n-1). - _Vincenzo Librandi_, Dec 05 2009
%F A170765 E.g.f.: (46*exp(45*x) - 1)/45. - _G. C. Greubel_, Oct 10 2019
%p A170765 k:=46; seq(`if`(n=0, 1, k*(k-1)^(n-1)), n = 0..25); # _G. C. Greubel_, Oct 10 2019
%t A170765 CoefficientList[Series[(1+x)/(1-45x),{x,0,15}],x] (* _Harvey P. Dale_, Mar 26 2011 *)
%t A170765 With[{k = 46}, Table[If[n==0, 1, k*(k-1)^(n-1)], {n, 0, 25}]] (* _G. C. Greubel_, Oct 10 2019 *)
%o A170765 (PARI) a(n)=46*45^n\45 \\ _Charles R Greathouse IV_, Jun 16 2011
%o A170765 (PARI) vector(26, n, k=46; if(n==1, 1, k*(k-1)^(n-2))) \\ _G. C. Greubel_, Oct 10 2019
%o A170765 (Magma) k:=46; [1] cat [k*(k-1)^(n-1): n in [1..25]]; // _G. C. Greubel_, Oct 10 2019
%o A170765 (Sage) k=46; [1]+[k*(k-1)^(n-1) for n in (1..25)] # _G. C. Greubel_, Oct 10 2019
%o A170765 (GAP) k:=46;; Concatenation([1], List([1..25], n-> k*(k-1)^(n-1) )); # _G. C. Greubel_, Oct 10 2019
%Y A170765 Cf. A003945.
%K A170765 nonn,easy
%O A170765 0,2
%A A170765 _N. J. A. Sloane_, Dec 04 2009