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 A180595 #21 Mar 12 2024 14:18:25
%S A180595 0,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,
%T A180595 8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,
%U A180595 7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7,3,8,4,9,5,1,6,2,7
%N A180595 Digital root of 5n.
%C A180595 Period of 9. - _Robert G. Wilson v_, Sep 20 2010
%H A180595 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,0,1).
%F A180595 G.f.: -x*(9*x^8+4*x^7+8*x^6+3*x^5+7*x^4+2*x^3+6*x^2+x+5)/((x-1)*(x^2+x+1)*(x^6+x^3+1)). - _Colin Barker_, Sep 23 2012
%t A180595 f[n_] := Mod[5 n - 1, 9] + 1; f[0] = 0; Array[f, 105, 0] (* _Robert G. Wilson v_, Sep 20 2010 *)
%t A180595 Join[{0}, ReplaceAll[Table[Mod[5n, 9], {n, 99}], {0 -> 9}]] (* _Alonso del Arte_, Sep 23 2012 *)
%t A180595 PadRight[{0},120,{9,5,1,6,2,7,3,8,4}] (* _Harvey P. Dale_, Jan 10 2024 *)
%Y A180595 Cf. A007953, A010888, A180592, A180594.
%Y A180595 Cf. A180592, A180593, A180594, A180596, A180597, A180598, A180599.
%K A180595 easy,nonn,base
%O A180595 0,2
%A A180595 _Odimar Fabeny_, Sep 10 2010
%E A180595 More terms from _Robert G. Wilson v_, Sep 20 2010